I always thought, why, I live near a 24-hour supermarket and a 24-hour Walgreens. I don't need to have much bandaging material because I can always make a quick run even in the middle of the night. WRONG!!! It sort of sucks to drive to the store when you're bleeding. So now I'm stocking more materials for dressing than before.

Also, for certain kind of bandaging materials (like Tegaderm -- very useful!) it can be much cheaper to stock up beforehand than to buy locally at the last minute. Like up to three times cheaper.