i carry a few items for my self and the Tundra...
-foam snow remover, looks like a 1'x6" flat piece of semi-hard foam with a extendable pole on it- they are sold at Napa and other Auto parts stores
works great for removing 1',2',3'+ of snow at one time (yes we have had over 3' of snow in one night befor in the past)
-couple of warm blankets in the back seat just incase i get crushed by a vehicle and am stuck in the ditch for a while (NYS police drive 2wd Tahoes and Crown Vics.) so emergency vehicles dont get down the road well in bad lake effect storms.
-fold up military style shovel for a possible dig out.
-3 or more snickers bars in the center console (you never know how long you may be out "In It!"
-last but not least.......Cell phone
Now a carry these items for the other folks out on the road that i might need to help....
-jumper cables
-serious duty nylon tow strap (a must for recovering snow stuck vehicles, easy on the drivetrain and gives the extra stretch and pull you need on ice/snow roads, way better than a 3/8"chain)
-4 cell mag lite
-road flares (this reminds me i need to re-up my inventory on these)
Good luck and dont drive to slow! yes to slow, i've seen way more accidents because a slow driver is causing him/herself to be a hazard in the middle of the road.
Look for other vehicles off the road, if you see one "SLOW Down Fast!!!
(dont use your brakes but get off the gas and let the engine slow down the vehicle)
Most winter accidents are caused by people getting over on the side of the shoulder to far and getting caught by the snow/slush and getting pulled in.
If this should happen to you -
HIT THE GAS and turn out of it or you will be pulled in - just dont oversteer to far or you become a 2 ton spinning piece of metal for others drivers to hit.
these are a few things that come to mind.