LinkedIn with Your Peers

LinkedIn is a social media site for professional networkers. Again, none of this Facebook shenanigans. 

Instead of having "friends" you have "connections."
These can be in the categories of:
friends
colleagues
classmates
partners
group members

You can upload your resume and the site will automatically create your profile that includes education, previous jobs and your current job. You can also request and display recommendations on your profile, and have a personal summary.

You can link other social networks like Twitter or Facebook.

Just make sure to keep your profile updated just like a resume — except people can see it all the time, and you never know who will be looking.