2. Get the right haircut. Okay, this isn’t a makeup tip, but this is such an easy way to slim down your face. If you’ve got bangs, make sure they start shorter in the middle and taper off to the ends. If you’ve got long hair, make sure you add layers that help shape your face. If you style your hair down, part your hair on the side, rather than the middle. Image via Original Hairstyles.