I recently reached 100 connections on LinkedIn, when a very senior guy in the oversea office invited me to join his network. For those of you who do not use it, it is like FaceBook but for professional networking purposes.
Instead of telling people your emotional issues, what you do for LinkedIn is that you post your career and education experience on a profile and you go around adding people. The idea behind it is that you may find someone who needs you expertise and vice-versa, which may lead to business deals or jobs.
For me, I just like to read people's profile online. Some of them are really great in that they are highly credentialed. You should join LinkedIn too if you like to network professionally,