Twitter 101 Smore flyer by Sherry Gick @LibraryFanatic
Twitter Tutorial for Beginners, by @julnilsmith. Thanks, Julie! I couldn't have said it better myself!
The Twitteraholic’s Ultimate Guide to tweets, hashtags, and all things Twitter by Sue Waters.
This page has a huge list of links to everything you'd like to know about using Twitter.
Cybraryman's Educational hashtag page by Jerry Blumengarten @cybraryman1
Go to this page to find hashtags that you are interested in.
Don't know who to follow on Twitter? Here is Jerry Blumengaarten's PLN Star Page
Go to the person's Twitter page, read some of their Tweets. If they look interesting to you, then follow !