Replying to Misty 720 - any tips?

Probably a bit of a weak request considering everyone here seems to be amazing....but.....The misty 720 is my favourite trick but I have not had the brass monkeys to try it yet. Any suggestion about how to learn it (rotations etc)and what are the key stages in the jump (e.g. it seems like the final little bit of rotation when you come around to an upright position is crucial...or?) I can try all this on a trampoline first so any tips would be much appreciated?