When there's snow on the ground, drive like you have an open cup of coffee in your lap. Turn, brake, or accelerate too hard and you spill steaming hot coffee on your bits. Winter tires will help a lot, but drive like you don't have them.
It's worth noting you should extend this mindset to those around you. An out of control car can slide a LONG way. Make sure you have the space and capability to get out of danger zones, or wait for them to be completely clear.
You might have proper winter tires, and be in control. This doesn't stop an idiot on summer ties gliding into you like an elephant on iceskates.
Also extend this to others. Give the cars ahead of /around you PLENTY of room to escape.