Try skateboarding or wakeboarding in the summer if you want something that will help you progress. I do think being a good mogul skier made me a lot more comfortable with moguls on a snowboard, but that's about it really.
Yeah man I Longboard and started to Freebord last year. Just wanted to impress my wife who like to ski. But I am prob not going to do it. I think for now I rather use that money toward other things.