You do this? I try to bang the ones I haven't talked to that much.
Pick up smoking, MDP. Not only will it help keep you slim, but it's a really easy way to have conversations if you like the skinny smoking type of girl. Smokers unite outside of bars, since we're all ostracized now.
And this has been said a million times in various forms, but it's worth saying again: don't give a !@#$. Just don't. If you care less, you'll be more confident in your interactions with women. If you're more confident (and you're not a friggin weirdo [that means no lectures about hammers]) women will be more attracted to you. Attraction is highly correlated with sex, believe it or not.