It's best if you simply do the things in life that you enjoy. Along the way you'll meet people with similar interests and eventually you will hit it off with someone. Take a night class, a second or third language, take a cooking class, join a running club or some other sport that interests you. Just be social.
Here's the key though, don't look to hard for it, women can sense that will avoid you. Plan9 made a great post way back when on this topic.
Getting Girls 101
Good luck...