For the past couple of months I've been using No Frizz Straight Making Styling Cream for Medium to Thick Hair ($24 for four ounces; Sephora.com). I spread what feels like a ridiculously large amount (at least a heaping tablespoon) through my damp shoulder-length hair—the strands must be completely coated in order to effectively block frizz-causing moisture. In fact, the instructions say, "Be generous. The more you use, the better you'll look." I'm not sure about that (I do know that the more I use, the sooner I have to buy a new bottle), but I can say that even when I apply two tablespoons of the cream, my hair doesn't feel sticky. After I distribute the product, I either blow-dry my hair straight or scrunch it to encourage its natural wave and let it air-dry. Not only do I no longer get frizzy, but there's an added benefit: The nongreasy coating repels oil and dirt, so my hair stays cleaner longer. Which means that I can skip a day between washings and be frizz-free.