Going for the first time this year, are there any must do's? like food, drink, or after skiing activities?
Boy, there'a a lot of good ones. Apres ski beers (outside if it's warm) - Slopeside Grill, Bear River, the T Bar.
Do a search, there are several excellent threads on Steamboat; activities, places to eat and other.
Sometimes using a directed Google search is better. Meaning search on something like "steamboat: epicski.com"