You can't. Honestly, having a sound offseason training program will certainly reduce soreness, but nothing will eliminate it. Don't use that as an excuse not to prepare, though. If you don't condition your body for the season, you'll fatigue faster, you'll end up really sore, and you'll be more likely to suffer an injury.
Also, instead of shooting straight for the bar after your day on the slopes, try foam rolling, get a massage, or sit in a cold tub. All of these recovery techniques will help you feel better--and move better--the next day.
--Craig Friedman, Performance Specialist, Athletes' Performance