Replying to Backflip Progression Tips

Alright, so I've bucketlisted doing a backflip on skis and I'm not one to back out of a bucklist item. I was just curious to see what you wonderful (and attractive) NS people have to say about a progression to a backflip. I can do it on a tramp and off of diving boards, but that's not the same I'm sure. What are the differences? What did you find helpful in learning to throw backflips? Is it more of a "suck it up and grow some lady balls" kinda thing?