Start working on your body, if you have high IQ start hanging with high IQ people, go to museums, start learning to paint in local art group where there are people your age, go Yoga classes (many chicks there also - pls. stay away from loonie type of women - i hope you have good nose for that), mixed aerobic classes - first go body-building
If you have physique problem: body-building, aerobics(running, swimming,...), get a good skin tanning(it makes miracles) but pls. do not over-tan!
Women like men first look at the physique, with good physique if you can attract many many women even if you are geek, after that you have to be able to speak, so that is why i encourage you to go to local art groups,museums,... where intelligent women tend to go, and many of them are darn sexy too, no matter what age (^_^)