First, find a computer. This may seem obvious, but you'd be surprised that quite a few people don't have a computer they can consistently use. If you don't have a computer immediately available, then find a computer lab that suits your taste.
Most departments have their own labs that can only be used by the students in that department.
You'll usually find that those labs will be less crowded, but that is not always the case. Like, for example, don't go near the journalism computer lab towards the end of the term, as a pile of frenzied freshman will be trying to print their visual communications projects. Second, learn to communicate. The Internet is a great way to keep in touch with people. Then you can send them messages that will pop up on their screen when they get on the 'net.