11 practical business uses for LinkedIn, Facebook and Twitter

Here is good summary article by Aliza Sherman listing the business benefits of using the major social media tools, LinkedIn, Facebook and Twitter.

She says :
"I’m often asked how social networks can be used for practical business purposes. While convincing people that LinkedIn is a good professional tool is not hard, many folks are not using Facebook for anything other than communicating with friends or playing games, and are not using Twitter at all; articulating the business value of Facebook and Twitter to those people can be challenging."