These are some of the personal thing I do in the winter, I won't get into driving tips as I think we all know what they are. Don't brake unless necessary, rock your car when stuck, or to clear the path at a red light, if very stuck spinning the tires quickly can cause friction to melt the ice/snow so you can gain traction. So, here are some other things I do to make the winter-world a little more bearable:
1. keep sunroof always tilted. when the car is parked after driving for a while / with a warm cabin, it will help moisture escape while allowing the cabin to cool quicker. you won't have fogged or iced windows in your interior when you get back in your car again.
2. spray exterior windows with de-icer when I park the car. stops ice from building up and can be pushed away when I get back to the car without needing an ice scraper. The de-icer I use is a concotion I made myself and keep in a spray bottle. It is a homebrew combination of Calcium Magnesium Acetate, dolomitic lime, and acetic acid that has been boiled and stored.
3. all my rubber window surrounds have been treated with white grease when it was warm. no worries about my glass freezing up and not opening. nothing more embarassing than pulling up to a drive-thru and you can't get your window down.
4. keep my tank always filled with gas. Automotive gasoline in subzero conditions weighs around 1.6LB per Litre. (or 6lb per 1 gallon). With the 65L gas tank on these e36's, that equals 104LB of weight on the rear wheels. Great for traction.
5. I keep a small (kid's size) shovel in my trunk, just in case I have to dig myself out, or if I'm helping someone else who is stuck. Doesn't take up much space, and does the trick.
6. I keep booster cables to help others out, or myself if required. Also keep flares, a blanket, spare gloves, amongst other things. Every year I use this stuff while helping others out.
7. If the car is ever stuck, I use the winter rubber mats from the drivers + passenger footwell under the rear tires to get them moving. Helps quite a bit.
8. I block the front kidney grills with a painted black sheetmetal that has been securely clipped to them. Less heat-loss for the engine means she heats up quicker.
9. I use DOT3 brake fluid in the winter. (not DOT4 as recommended by BMW). While DOT3 brake fluid has a lower boiling point, it remains more viscious in subzero temperatures. Nothing worse than having a stiff brake pedal that doesn't want to move in those freezing mornings. Some people mistake this for the calipers possibly having ice on them. I switch back to DOT4 in the summers.
10. 5w30 engine oil to keep her starting up happy those cold mornings. Most engine wear occurs during start-up when she isn't all lubed up and ready to go.
11. Winter windshield wipers. These things are a life-saver, they scrape the ice like an ice scraper and are built of a tougher rubber so they won't get damaged and brake apart from scraping against ice and bumpy surfaces.
12. Undercoated the car and all panels, rust-checked the entire car. She's my beater, and I want her to last.
13. If there is water on any of my windows, I squeegee this off when I park. Means no ice to worry about next time... and allows my concoction to be more effective. The only time it doesn't work very well is if it is raining when I spray it on, then later on that night temperatures go sub-zero.
Safe driving everyone.