If you're going to tumble forward, my instructor said, you should land on your knees and forearms. Backwards, you should curl into a ball and roll into it. A common snowboard injury is to the wrist because it's basic instinct to break a fall by landing on your hands. I did this a few times and it killed . Ice makes snowboarding tougher and your falls more brutal.
Most injuries happen at the end of the day, when skiers and snowboarders are on their final runs.
Because fatigue causes you to get sloppy with technique. So quit on the early side, especially if your technique is sloppy to begin with. Finally, there's no way to appreciate how sore your body is going to be the next morning. I've ever had, and it covered my body head to toe. Skip the extra 20 crashes and get into a hot bubble bath instead.