If you're at the point where you're starting to think about jumps and spins and such, look up the Snowboard Addiction videos. I bought them last year and they have made a big difference in understanding the mechanics of jumps and such.
You'll get lots of opinions from ppl on this forum (you just did!), and there are a lot of knowledgeable ppl here, but what you need is enough information to decide for yourself what makes sense.
I've been doing what virus says, based on the SA vids. It's important to understand the difference between rotated spins and counter-rotated spins. It's also important to know how you're supposed to land counter-rotated backside spins (you land looking uphill, which is not intuitive).
I know I sound like a shill for the videos, but when I find something that I like, I figure I should pass it on.
I hate the parts between winter