The trick is to put yourself in a place where there are people who you're likely to be interested in, on a regular basis, but do it for yourself. Learn an instrument, but do it in a music store. Volunteer somewhere you're interested in helping, etc. Bars are bad for me. I know I either appear like a bar-fly (sitting in a corner, alone, seemingly engrossed in my alcohol (how do they know it's soda?!?)), or way too desperate (checking everything that's (hopefully) female). Or both. Online dating is really good, but I look at it like practice. I can see what works and what doesn't, and be like "Oh, hell, I should NOT have said THAT!", or whatever.