Research says that putting a few drops of lavender oil on your pillow at night helps you sleep like a baby. Well, when you're crampy or cranky, your beauty rest will take all the help can get. If you can't get your hands on the oil form, grab a lavender-scented candle or incense. It's a relaxing smell that will help you forget about the discomfort and instead make you feel you're floating on a cloud.