LinkedIn is a great tool for professional networking. I know of several instances where people have been contacted with potential jobs because of the strength of their LinkedIn profile.
However, a lot of people are using in wrong. Instead of using it to give and take, they only want to take. Or they try to take only at the end – when they need it, instead of cultivating the process along the way, so it is ready when they need it.
Inc magazine did a good write-up on LinkedIn recently, and came up with several ways to make sure that you are using it correctly.
Take a look at their article, and work on fixing your profile if you have one. Or creating one if you don’t.