Will give these a go. Cheers
If you don't have an indo board, an upside down bosu ball works as well. I try to do 3 sets of 50 squats. Each squat I reach down and touch the bosu, kinda like you're doing different grabs. I got this from Seth Wescott's routine (he does 3 sets of 100 on a Swiss ball).
I mix this in-between days doing core or lifting. I think the best thing to do is incorporate balance into every exercise. For instance, I bench press while lying on a Swiss ball and do presses balancing on one leg. You can get creative.
For a beginner, this isn't a bad routine: Snowboard Workout | Pro Ride Snowboarding Camps, BC Canada