Ski the entire mountain, from left to right, all in one day. I don’t mean ski every run, just ski all the sections.

They’ll say you can’t do it, but you can if you’re good. Go up the cog-wheel train as early as you can, go up all the gondolas, ski down the left side of the mountain, take the gondolas to the top near the Matterhorn, ski all the way down to Italy, and make it back before the lifts close. You’ll have had one of the longest skis possible in a ski resort without ever retracing your steps.