Heres an old guide written by myself.
http://www.bboy.org/forums/showthrea...threadid=27426
New tip to add to that is to try and keep your body like your torso and upright and straight as possible of course it cant be exactly 90 degrees but the closer it is to that angle i find it alot easier.
I know thats a very old guide so if you have any more specific Questions PM me or something.