Become super solid at freeriding (no edge catches, etc)
Learn rails & boxes, at least 50/50's
Grabs & 180's off kickers
I'm basically a novice/intermediate rider, but I think these goals should be within reason, since I'll be going to the mountain every other weekend this entire season.
Some more ambitious goals would be:
Learn boardslides and lipslides
Learn to spin onto (or off of) of rails & boxes