The "tried and true" method is posting as much as you can on topics that actually interest you (so your response is longer than a sentence), and through your posts attempt to define the type of person you'd like others to think you are.
Then some folks will message you.
...and then you'll talk.
Talk some more.
Aaaaaaaaand eventually if you play your cards right, you don't scare them off with overt creepiness, and you convince them that the words they read on a screen are actually connected to a reasoning, attractive member of society, you may get a chance at meeting up and tickling someone.
It works, man. Good luck.