Give yourself plenty of time. A lot of problems happen because people are rushed.
Clean your car off completely. This includes the snow on top of your car that can fly off and impair the vision of another driver.
Check the weather and traffic reports before you leave. Avoid areas of high congestion.
Go slower on bridges. They ice over earlier than the rest of the roads and can be quite dangerous.
Slow down. Don’t go so slow you are impeding traffic, but don’t push yourself to go faster than you feel comfortable. This goes for four wheel drive vehicles as well – they can still slide on icy patches.
Watch for black ice at night and in the early morning.
Refill you windshield wiper fluid and make sure you have extra. Poor field of vision can cause accidents.
Check your tires. If they are old or worn, you probably want to get them replaced.
Minimize distractions. Driving in bad weather is difficult enough without trying to multitask something else.
If the news says stay home, stay home unless you absolutely need to leave the house.