If cooler weather means dry, flaky skin, you might find Rhonda Allison Drop of Essence Hydration Drops ($48) to be a quick fix. A tiny dab of this serum goes a long way to hydrating skin, even after a peel or sunburn. It also has nice, straightforward ingredients, so you know exactly what you're getting: omega-6 fatty acids, vitamin E, geranium oil, and lavender oil. That's it, and the geranium and lavender give the drops a nice scent without making them overpowering or irritating. While the full size bottle would last forever, you can also get the pocket (and pocketbook) friendly half ounce bottle for $14, too.