Actually to be honest, i'm not quite sure if that's possible, since males require a different kind of approach then girls do. But there might be some things that could be taught to you, which are the following:
- Build up confidence. How? Just love yourself, the way you are, the way you look, no matter how short, old or whatever you are. If you don't love yourself, you can't expect someone else to right?
- I know from experience that girls expect guys to approach them. Well, the truth is, a lot of guys actually have trouble picking up invitations from girls to approach them, such as proximity or eye-contact. However eye-contact is a strong indication of interest, so make sure you use that

- Approaching guys requires a lot of guts, but to be honest, you don't necessarily have to be a great talker. Last Saturday 2 girls approached me and friends asking about cheese. We talked for 10 minutes and it was cool. Just an example.
- Looks are the first thing a guy looks for in a girl. Make sure you groom yourself up, such as attractive make-up (how much you put on depends on what makes you comfortable), sexy earrings, or a dress, it's all good. A sweet scent of smell also works wonders (at least for me, I liked a girl but turned her down because she didn't take good care of herself).
Hope these tips help.
Wallie