LinkedIn does not catch a lot of attention from most people online. Anyone with a career usually has a LinkedIn profile but most people (including yours truly ) do not pay attention to getting the most out of this social network for professionals.
Business Insider has a nice infographic that tells you steps on how to go about mastering LinkedIn.
You might also want to check out how to looked up alumni information using your LinkedIn profile.
Do drop in your comments.
Related: Flowchart to decide which Social Network to post on!