1. Weathertech floor mats. Helps with snow, dirt, soda, chips, etc.
2. Upgrade the headlights to HIDs. You can see much better with HID's (low beams and fogs)
3. Upgrade the high beams to HIRs. Much brighter and "flash" able.
4. Rear driving lights installed (gets people with high beams to shut them off)
5. A shackle/tow hitch. Motivation to get people off your bumper and you can help pull other folks out of snow banks.
6. Higher lift/springs (e.g. spacer lift, FJC springs, etc.) for clearance
7. Larger tires when the time comes as they can help with curb/rim rash