Arena sesh if you don't have a drop in, drink, go swimming, cliff jump, trampoline, skateboard, photography, work, and finally but most importantly troll NS 24/7. This is what i'll be doing this summer.
hopefully go to a summer camp in europe on the glaciers
also surf and skate alot with mates and summer set up
also living in england, i get to laugh at you for a few months while i have a dryslope/ indoor slopes with park, but then it starts to snow in other places and you laugh at me
Get a Job and hit the gym. If you have extra cash to travel to comps, or take more time off to ski it'll be worth missing out on club beach to get extra turns in.
Also, getting stronger, more flexible, agile will probably help your skiing out more than anything else. I can guarantee you 99% of the pros spend a ton of time getting fitter in the summer in preparation for the coming season, or rehabbing nagging injuries.