This Google resource brings together the latest industry facts and insights. These have been collected from a number of third party sources covering a range of topics from macroscopic economic and media trends to how consumer behaviour and technology are changing over time.
Twit Cleaner gets your following list, then analyses the profiles & tweets of every single one of those people, looking for certain patterns of behaviour (people not talking, being over repetitive, common spam tactics, posting the same links repeatedly, etc). It's then up to you to decide who to save & who to unfollow.
Example for alcohol consumption
DB: http://sda.berkeley.edu/cgi-bin/hsda?harcsda+gss08nw
Variables:
Row: Drink //Column: Year Race Sex Region
God(r:1-3″Non-theist";4-5″Believe, But Doubts";6″Know God Exists")
Relig Polviews Degree Wordsum
SDA is a set of programs for the documentation and Web-based analysis of survey data. SDA is developed and maintained by the Computer-assisted Survey Methods Program (CSM) at the University of California, Berkeley.
The dataset links labeled "Quick Tables" use a simplified user interface for generating basic crosstabulations (from a pre-selected subset of the variables in the study). The other dataset links use the standard SDA interface.