Understand your skin type, which may require a discussion with your dermatologist, suggests Dr. Hooper. It's easy to be swayed by marketing and packaging that promises perfect skin for all types, but your skin type determines the ingredients in your moisturizer. For example, someone with sensitive skin will want to avoid fragrances. And while someone with dry skin will want an occlusive moisturizer with oil-rich ingredients like petroleum, someone with oily skin will want to avoid those same products. Consult with your derm to get a better understanding of your skin type, follow your doc's recommendations for best products to use, and be prepared for some trial and error, says Dr. Hooper. [Dr. Hooper] Follow the guides below for help with your moisturizing your routine.