I just started using it in the last couple months, for the same purpose you did--to get information "out there". I tweet all my blog posts, and since I started writing for BellaOnline, I've tweeted all my article postings here. Don't know if it's helped or not, but at least I'm trying to fit in...LOL.
One important thing I learned about Twitter is that you can include hashtagged words in your tweet, like #contest or #ebook, meaning "my tweet is with regard to this topic". Other people who are searching for information on that topic can search for the hashtagged term and discover all the relevant tweets.
Ooh, I feel so "with it" for sharing that information!