When it snows, I will throw some in the bed, deeper snow, more in bed. Then I carry some sand in a gallon jug, easy to pour under tire, and stays dry in cab. Also a shovel, I carry a garden spade as it is better to dig in tight places like behind tire. First dig snow clear from spinning tire (and any other tires that have snow piles behind or in front depending on direction you are going to go), straighten the front wheels, then apply some sand at the spinning tire and it should come out easy.
Also, I understand that limited slip rear end in 2WD pickups is not as good in the snow as an open differential. This is because with an open differential, when you break traction, it's only one wheel, the other maintaining some directional stability, but with a limited slip, both wheels spin and the rear end slides out much easier.