100 Tips to Be a Smarter, Better Twitterer | Computer Colleges
http://www.computer-colleges.com/blog/2009/100-tips-to-be-a-smarter-better-twitterer/

"Twitter is a fun and useful tool, but there are a lot of quirks, rules, and standards that come along with it. To be effective on Twitter, you’ll need to learn the lingo, mechanics, and the ins and outs of interacting with followers. Here, we’ll take a look at 100 tips that can help you do just that."

A good categorized list that has tons of relevant links and short explanations that are enough to be helpful but not so much as to be overwhelming.