i think it's time you really got to know your body. some girls like getting oral sex and it makes them orgasm. some girls don't get orgsm that way. the same goes for all the other sex acts -- they don't always work for everybody. you need to figure out what it is you like, and what it is you definitely don't like. if you're definitely enjoying one sort of activity, but it's not quite gettingyou there, maybe ask your partner (or yourself -- masturbation is a many splendored thing) to make some small changes (touching this way instead of that way, etc.)

check out http://www.scarleteen.com/sexuality/response.html and learn how your body responds to sexual arousal.

and of course, we can't give you specific step-by-step instructions for legal reasons, even if we could, it probably would do no good. but good luck trying.