For the best in academic information, go to a Ph.D. Blogs written by PhD's have great content and sometimes very frequent content. There are some blogs that are mostly aimed at other PhD's, but some are for the general populous. Enjoy topics of all kinds with expert information. You might even get some freebees.
A post about how Twitter differs from Facebook re networking. This post is from an entrepreneur's perspective, but there are parallels here for researchers and the most agile and adept researchers also use Twitter in much the same way.
Papers revolutionizes the way you deal with your research documents. It allows you to search for them, download and organize them together with supplementary material, allows you to read them full screen, highlight and keep notes, sync them to your iPad or iPhone, cite them in your favorite word processor, share them with your colleagues, and much much more.