Here are some great free resources for using Social Media to help you grow a business:
“Business Owner’s Social Media Toolkit” – from Inc.com
Succinct how-to articles in the categories of: Blogging, Social Networking, Multimedia Tools, Online Reviews and Opinions.
“The Ultimate Twitter Guide” – from Desk.com
First of all, I like the form of this – it’s an HTML Guide, not an eBook, not a paper book, and the medium fits the message. Whole sections on using Twitter for marketing and business.