1. At sunset or sunrise, remember that your shadow is pointing in the general direction the car will be coming from that doesn't see you and subsequently runs you over. If you don't see your shadow, be alert for cars behind you.

If your shadow is in front of you, be alert to cars in front of you.

2. On your winter bike, have a wheel/tire combo that allows the tire to go off/on easily. It's no fun to be struggling to get a tire off a rim when your fingers are frozen.