Tiger Balm/Ben Gay, if you've got a few really specific spots of OH MY HOLY OW. Massage the whole area with some oil — olive or grapeseed oil is just fine if you don't have Real Grownup Massage Oil around — using the heel of your hand as much as you can, long strokes that just feel like you're smoothing the muscle out. Light stretching that doesn't really push the muscles but gets them warm should help.