One of the main causesof accidents in winter time is people's apparent lack of winter car care.
As with the "cornering" thread I do not want to start "preaching the good lecture" here

- but merely get you to think and discuss so that we all learn a little from each other.
I shall kick you off by stating the obvious!- which astoundingly is exactly what a lot of people out there actually neglect!
1.
Check the coolant mixture. We all know as seasoned petrolheads that if the coolant (antifreeze and water) actually freezes - it wrecks the engine! But do our lurkers and visitors to the site?
A garage can test this for you - or you can buy a coolant tester. Do not top up with plain water as this can cuase corrosion. and obviously does not protect against the cold.

(Once had someone breakdown in spectuclar fashion on A1 through this

)
2.
Check the drivebelts Look for damage and check tension of the belts. These should be part of the check list on your services - so please ensure this has been done. One belt may drive all the ancillaries or several may be sued However - for checking purposes belts (fan belt, coolant belts, power steering pump drive belts, etc, etc,) belts should be tight enough to stop slipping - but not too tight. If you can push it down by 5 -10 mm with a gentle finger pressure in the middle of the longest belt run between the pulleye - this should do.
If it is too slack - your engine squeals and too tight - your engine hums.
Access can be tricky - seen Wildy lying underneath cars before now!
Look for cracks, fraying or splitting and any shiny patches. These are clues of wear and tear .... also uselul to ensure garage has checked these. We blob a little nail varnish on stuff we identify as requiring new bits.
Can you drive with broken belts? ...
Coolant belt? No - engine overheats
Alernator ? OK for short distances but your dash will show warning light that your battery is not charging.
Power steer drive belt? Ok to drive - but steering will be heavy.
Air conditioning belt? Air conditioning will not work!
3.
Check the hoses for leaks. (Giveaway sign is puddle left by yoor car and if you have to keep topping things up!)
Little test - how many of you recnise the symptoms for leaking brake fluid (very dangerous), clutch fluid? automatic transmission fluid? oil? final drive oil (manual transmission fluid? washer fluid? coolant? shock absorber fluid> power steering fluid? Or even where to look in the engine?
4.
Check the battery!

Condtion and check and clean connections -
Treat corrosion on battery tray with water and baking soda, prime with zinc based primer and paint over.
check battery for damage and leads for fraying
white powdery deposit on cable clamps? disconnect and either brush or - pour hot water over and apply vaseline.
If battery is maintenance free - look for a charge indicator or leaf through the handbook!
5.
Check the wipers and washers etc
6.
Check all your lights and indicator bulbs.
================================
Now granted - am no mechanic

But these are the things lot of people do forget about and it causes problems in winter.
What other things would you consider essential for winter driving?