I'd say the most important thing with almost anything snowboarding progression related, but mostly in freestyle is confidence. You need to ride confident. The difference between riders with the style and riders who are sloppy is their confidence. If you become comfortable with a trick before you do it you have a much higher chance of sticking it first try.
Now I'm not saying go ape shit. I'm just saying when you do progress, even on the tinniest of things, you need to already think in your head you have mastered to trick.