Ice, not in a glass, or on your windshield, but in a wrap, or whatever, on an injured body part. Been walking vigorously again following a bout of shin splints, and either injured my knee walking or stretching. Too much of a good thing, or maybe I'm just getting old.

Though I know from past experience that it is best to ice ASAP I waited a day. I was limping around feeling a pain everytime I put my foot down. A couple of hours of icing on and off, and I'm considerably better. Good stuff.