frontside off the toess...
Well i havent really tried on a sizable jump but on flat ground i can get get 3's and a 450' off of hip trannies. wind hard, get on your toe edge but dont lean ( that's what is gonna make you tip out of axis), pop HARD! and get that spin going. Your board will delay the rotation, but the tourque in your lower body will kick it around suuuuuper quick.
Just takes practice young padewon. That is going to be the most top notch advice I can give ya.