Snowboard at Keystone and Arapahoe Basin. It's easy to visit the other Summit mountains because there is a bus that goes from Breck, keystone, and Arapahoe Basin. Also Copper Mountain is not too far away. If you are renting a car, fill up at a shell station because they are offering 2 for ones at Copper. I think Saturday is blocked out. Keystone has much closer free parking and Arapahoe Basin has parking you can ride too.
In the Town of Breckenridge you will find many restaurants and shops, most are independent small businesses. Skip the Vail owned crap on the mountain and the bases, they suck and are very pricy. Ride the gondola into town you will find better quality restaurants and shops at walking distance.
The Crown (late night buzzed coffee)
Daylight Donuts (fatty grease breckfast and yummy donuts/coffee)
Geopedros(sp?) pizza and Italian food, they sell slices
Stella's Hungry Horse (food cart very close to Gondola in town, yummy!)
Empire Hamburger, bar (big fancy burgers)
Agree about those Crepes
Liquid Lounge (Breck crazy bar)
Motherloaded Tavern (tall cans! Trivia!)
Euro Deli, (they have perogies
Mountain Wave, (best rentals most helpful shop)
Big Hit Snowboard Shop, (steezy good deals)
Peak a Boo Toys (great place for kids, lots of cool stuff)
Pets Sake Thrift Store, (good clean used stuff)
Walking down mainstreet at Breck is good people watching and is interesting.
Ofcourse there's more good shops and restaurants than the ones I listed.