The best advice I can give you is learn to ride switch!
The following paragraph is from an article I wrote on Switch Riding
<- full article
Full-body workout: When you incorporate switch into your snowboarding you will get a much better full-body workout. If you constantly ride in one direction, you are only working certain muscles on either side; this often leads to rapid muscle fatigue (think about your back leg on cat-tracks or towards the end of the day). You are working the different sides of your body in different ways; not only will this lead to fatigue, but you increase the chance of injury.