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Normally, when adenosine levels reach a certain point in your brain and spinal cord, your body will start nudging you toward sleep, or at least taking it easy. There are actually a few different adenosine receptors throughout the body, but the one caffeine seems to interact with most directly is the A1 receptor.

it functions as a supremely talented adenosine impersonator. It heads right for the adenosine receptors in your system and, because of its similarities to adenosine, it's accepted by your body as the real thing and gets into the receptors.

caffeine actually binds to those receptors in efficient fashion, but doesn't activate them—they're plugged up by caffeine's unique shape and chemical makeup. With those receptors blocked, the brain's own stimulants, dopamine and glutamate, can do their work more freely—"Like taking the chaperones out of a high school dance,"

caffeine very clearly doesn't press the "gas" on your brain, and that it only blocks a "primary" brake. There are other compounds and receptors that have an effect on what your energy levels feel like—GABA, for example—but caffeine is a crude way of preventing your brain from bringing things to a halt. "You can," Braun writes, "get wired only to the extent that your natural excitatory neurotransmitters support it." In other words, you can't use caffeine to completely wipe out an entire week's worth of very late nights of studying, but you can use it to make yourself feel less bogged down by sleepy feelings in the morning.

What's important to take away is that caffeine is not as simple in effect as a direct stimulant, such as amphet

amines or cocaine; its effect on your alertness is far more subtle.

The general consensus on caffeine studies shows that it can enhance work output, but mainly in certain types of work. For tired people who are doing work that's relatively straightforward, that doesn't require lots of subtle or abstract thinking, coffee has been shown to help increase output and quality. Caffeine has also been seen to improve memory creation and retention when it comes to "declarative memory," the kind students use to remember lists or answers to exam questions.

The effectiveness of caffeine varies significantly from person to person, due to genetics and other factors in play. The average half-life of caffeine—that is, how long it takes for half of an ingested dose to wear off—is about five to six hours in a human body. Women taking oral birth control require about twice as long to process caffeine. Women between the ovulation and beginning of menstruation see a similar, if less severe, extended half-life. For regular smokers, caffeine takes half as long to process—which, in some ways, explains why smokers often drink more coffee and feel more agitated and anxious, because they're unaware of how their bodies work without cigarettes.

regular caffeine use has also been shown to decrease receptors for norepinephrine, a hormone akin to adrenaline, along with serotonin, a mood enhancer. At the same time, your body can see a 65 percent increase in receptors for GABA, a compound that does many things, including regulate muscle tone and neuron firing. Some studies have also seen changes in different adenosine receptors when caffeine becomes a regular thing.

A 1995 study suggests that humans become tolerant to their daily dose of caffeine—whether a single soda or a serious espresso habit—somewhere between a week and 12 days. And that tolerance is pretty strong.

You start to feel caffeine withdrawal very quickly, anywhere from 12 to 24 hours after your last use. That's a big part of why that first cup or can in the morning is so important—it's staving off the early effects of withdrawal. The reasons for the withdrawal are the same as with any substance dependency: your brain was used to operating one way with caffeine, and now it's suddenly working under completely different circumstances, but all those receptor changes are still in place. Headaches are the nearly universal effect of cutting off caffeine, but depression, fatigue, lethargy, irritability, nausea, and vomiting can be part of your cut-off, too, along with more specific issues, like eye muscle spasms. Generally, though, you'll be over it in around 10 days—again, depending on your own physiology and other factors.

Beyond the equivalent of four cups of coffee in your system at once, caffeine isn't giving you much more boost—in fact, at around the ten-cup level, you're probably less alert than non-drinkers.

The meditation group outperformed the others when it came to reduced stress, greater focus, and improved memory. The waitlist control group didn't have reduced stress until after they did the meditation training eight weeks later. The relaxation group, oddly enough, wasn't any less relaxed at work. Although the meditation training involved a two hour session each week, you could probably see similar benefits from just a two-minute daily meditation habit or regular use of tools like Buddify to help you get started meditating.

Actually, scientists are finding that the ability to detect sarcasm really is useful. For the past 20 years, researchers from linguists to psychologists to neurologists have been studying our ability to perceive snarky remarks and gaining new insights into how the mind works. Studies have shown that exposure to sarcasm enhances creative problem solving, for instance. Children understand and use sarcasm by the time they get to kindergarten. An inability to understand sarcasm may be an early warning sign of brain disease.

23 percent of the time that the phrase “yeah, right” was used, it was uttered sarcastically. Entire phrases have almost lost their literal meanings because they are so frequently said with a sneer. “Big deal,” for example. When’s the last time someone said that to you and meant it sincerely? “My heart bleeds for you” almost always equals “Tell it to someone who cares,” and “Aren’t you special” means you aren’t.

Sarcasm seems to exercise the brain more than sincere statements do. Scientists who have monitored the electrical activity of the brains of test subjects exposed to sarcastic statements have found that brains have to work harder to understand sarcasm. That extra work may make our brains sharper, according to another study. College students in Israel listened to complaints to a cellphone company’s customer service line. The students were better able to solve problems creatively when the complaints were sarcastic as opposed to just plain angry. Sarcasm “appears to stimulate complex thinking and to attenuate the otherwise negative effects of anger,” according to the study authors.

The mental gymnastics needed to perceive sarcasm includes developing a “theory of mind” to see beyond the literal meaning of the words and understand that the speaker may be thinking of something entirely different. A theory of mind allows you to realize that when your brother says “nice job” when you spill the milk, he means just the opposite, the jerk.

Sarcastic statements are sort of a true lie. You’re saying something you don’t literally mean, and the communication works as intended only if your listener gets that you’re insincere. Sarcasm has a two-faced quality: it’s both funny and mean. This dual nature has led to contradictory theories on why we use it.

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When Pat gets old he can retire comfortably and leave his widow comfortable as well, again was this because of savings, no; Pat got a company pension (inflation adjusted) and health care for the rest of his life with right of survivorship. All of this sounds great, but it wasn’t real; it was all a result of America ability to overcharge the world for capital goods; the costs of all these benefits were passed on to the rest of the world in higher priced capital good and dollar inflation. These programs allowed people to live middle class lives they never earned and could never keep (absent the programs). In fact, by 1970 it cost an American producer more in labor cost per ton of steel than what he could get for it on the world market. The fantasy world America has built post-World War 2 has been falling apart since the 1980s and the last leg, the dollars reserve currency status, is about to go. The disappearance of the American Dream is simply America reverting back to where its populations core values and behavior patterns would naturally take it.

The American Dream is rapidly fading because it was never real or at least never genuinely earned by Americans. When I speak of the “Middle Class”, I don’t simply mean possessing a middle class income, but rather having middle class patterns of behavior and world views. To be middle class is to be future time preference oriented; to accept short term pain for long term gain; to always be looking to get ahead and to plan ahead. Simply put, to be middle class is to consume less than what you produce, reinvesting the excess to produce more in the future.

America was the only large industrial power left standing after World War 2 and because it could charge the rest of the world what it wanted for capital goods, it could extract “rents” to support the fantasy of the American Dream. Consider the 1950s, the beginning of universal White middle-classdom and take a typical Irish guy; Pat. Pat grew up in an ethnic Irish slum like his father and grandfather, but he now can afford to buy a house; is it because he diligently saved his money and stayed focused, no; it is because he can get a VA loan or an FHA loan with no money down and easy payments. Pat dropped out of school at 16 and is not too interested in expanding his skills, is he on the streets, no; because of unions he can get an assembly line job. Moreover, because the NLR act effectively unionized every major industrial company and industry, Pat can look forward to annual raises (regardless of productivity) for his entire working life. When his children are old enough, Pat can afford to send them to college, is it because he saved before each child was born and spaced his children accordingly, no; they can get government loans , grants, and go to a subsides state college. When Pats parents get old they are not a burden, is it because they learned middleclass values and started to save, no; his parents rely on social security and Medicare (after 1965).

Europe is on the verge of a complete and total economic collapse...why?...because for decades their government has used force to take money from those who work hard and then give that money to those who don't work hard.

The capitalist equivalent of a socialist revolution is a Great Depression that wipes out the value of the paper assets the wealthy had accumulated, leaving the government to reallocate the real assets more equally. We almost had this happen in 2008, but the 1 percent blackmailed the rest with fear of collateral damage.

Money is like fire - it can warm you and keep you safe, or it can burn you.

Remember, it's possible to work toward your mission and make a fair profit, no matter if you are a non-profit or for-profit.

To train to read faster, you must first find your base rate. Your base rate is the speed that you can read a passage of text with full comprehension. We've defaulted to 300 wpm, showing one word at a time, which is about the average that works best for our users. Now, read that passage using spreeder at that base rate.

After you've finished, double that speed by going to the Settings and changing the Words Per Minute value. Reread the passage. You shouldn't expect to understand everything - in fact, more likely than not you'll only catch a couple words here and there. If you have high comprehension, that probably means that you need to set your base rate higher and rerun this test again. You should be straining to keep up with the speed of the words flashing by. This speed should be faster than your inner voice can "read".