We've posted this before, but thought it was appropriate for those of you still looking to run outdoors despite the snow and ice.
Supplies you'll need: A drill, 20 or so 1/4" sheet metal screws with half 3/8" long and half 1/2" long, and a 1/4" bit driver. Obviously you'll need shoes as well. This process shouldn't harm them at all, but if you're leery you might not want to use a brand new set.