Female - 28 Years Old
Talk to them, don't be a creep and having similar general interests help.
Don't talk to them online toooo much before meeting, because then they get used to your online persona and have expectations of that's who you are. You have to get to know them in person before wasting months chatting online, realizing when you meet them you are someone totally different (or vice versa). But chat them up online so you can get a feel if you have any chemistry...and figure out if they're an ax murderer.
Did the online dating thing for a while...and I've landed myself in an awesome 3 year relationship. Note:You will meet a lot of duds.