If cayenne sets your taste buds on fire, it can also keep your toes toasty. Sprinkle a little cayenne on the outside bottom of your socks and you'll feel the warming effects almost immediately. This technique is most effective when you're moving around so that "the cayenne works together with the natural pumping action of your blood to increase body heat," says Lalitha Thomas, author of 10 Essential Herbs (Hohm Press). When spicing up your socks, be careful not to get cayenne in your eyes.