besides practicing and studying how others do it, what tricks are you specifically talking about?
I can do:
3 point turn reverse
reverse circles (here's a lil; i only did one because i was focusing on just reverse riding in general
http://www.youtube.com/watch?v=kRdqzb21nTc
but now i'm trying to learn how to do it with no hands but its a tuffy)
180 skid
360 skid
hockey stop
trackstand (incl one hand, no hand)
one foot on pedal, other on front wheel trackstand
bunnyhop (nothing serious but it gets the job done)
which one you need help on?