I know it already got mentioned, but again: DON'T buy a season pass. I know that in the US this is the only way to get discounts and most people have one, but in pretty much all the European resorts, discounts kick in from your second day of skiing. Plus, Lausanne is in the middle of it all, so no worries about distances.
Weather can be a mess in early winter, though. The freeride season usually peaks after mid January.
Oh, and def. go visit the High Fly: www.high-fly.ch
If you get sick of pow and want to shred Europe's best park, come to Laax