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Twitter, a real-time short messaging service created in 2006, now has an estimated 6 million users and is growing everyday. It is a vital part of the social media scene, so you should know how to use Twitter effectively for business.

Follow and un-follow
Twitter enables you to follow the postings of registered users on the site; they can opt to follow you. Is it impolite to not follow someone who's following you? While many advocate for reciprocity, the reality is that following too many Tweeters can eat up time and obscure postings that would be meaningful to you. Do follow followers who may provide helpful information, but otherwise be selective.

Know the rules
On Twitter, you are limited to 140 characters per posting. However, it's still wise to use real words and abbreviations; don’t use SMS-style text (SMS-style shorthand, the type used for text messaging). Full sentences are not required and symbols, such as "@" and "="  can be acceptable when needed to meet the 140-character limit. Definitely shorten URLs (using TinyURL or other sites) to save characters.

If you need to say more than the Twitter format permits, you can link to your blog or other posting that contains more information.

Retweets
If you read something that you think will be of value to others, you can pass it along ("retweet"). Be sure to give appropriate credit to the original post. Just say "RT @ username" of the original post and then add the original tweet.

Resources
Find statistics about your postings and views on Twitter from TweetStats. Find other users like you from JustTweetIt.