One of the easiest hairstyles that make long hair look short is curls. The key is to embrace big, tight curls that instantly take inches off your hair. I use volumizing curl sprays and mousse to add body to the hair before curling. It helps the curls stay in place all day. Depending on the thickness of your hair, you'll need around 15-30 minutes for this one. For me, it look like I cut six inches off my hair just by curling.