I usually try to avoid the dreaded white stuff at all costs. But just in case, I have a shovel (little one, WWII GI e-tool, but better than nothing), chains, sleeping bags, tent, tarp, one burner stove, some food, some water, little bitty propane lantern, coffee can with TP roll and several bottles of rubbing alcohol, cell phone, CB radio, GPS with local terrain, including all topo map info. We dress for the weather, in winter have rain gear and warm clothing along even if we don't plan on wearing it. So if I can't get unstuck, at least we can be somewhat comfortable for a while...