Register an Account
Read Quality Articles
Read some quality articles. If you can manage to not get banned for like five minutes, you can even post your own articles.
Argue with People on the Internet
Use your account to explain why people are wrong on the Internet forum.
Vandalize the Wiki
Or don't. I'm not your dad.
Ask and/or Answer Questions
If someone asks a terrible question, post a LMGTFY link.
Make Some Money
Hire freelancers and/or advertise your goods and/or services. Hire people directly. We're not a middleman or your dad. Manage your own business transactions.