In any event, add some weight to the rear. Make sure it won't shift around, and possibly damage the truck or even worse, cause a shift in weight distribution, which itself could cause a skid. Plastic cans of sand or kitty litter will do. You can also use the stuff, in conjunction with a shovel, to help get un-stuck. Keep a towing strap, rated for your vehicle's weight on board, and learn where the front and rear attachment points lie on your vehicle. Practice attaching them in the dark. Keeping the gas tanks full helps a bit as well.
After the first snow, find a BIG, flat parking lot, and then practice getting into and getting out of skids. Watch out for light poles.
If money's tight, then get a set of cables or chains for the rear wheels. Neither can be run on dry pavement, but only when there is snow/ice on the road. Practice putting them on and taking them off till it becomes second-nature. Do this in the dark and without using a jack.
If you can afford it, getting some real, honest-to-goodness SNOW tires is hard to beat, but you'll still benefit from added weight in the rear of the truck. Smart trick here is to get a couple of spare wheels (or one if you have a full-size spare), mount and balance the snow tires, and then you can shift tires out pretty easily. You'll wear them out pretty quickly if you run them in warm weather, so put them on at the last minute, and take them off as early as possible in the spring.