For your personal-best brows, put down the tweezers and upload a selfie to Benefit’s Brow Genie (benefitbrowgenie.com). The site’s facial-recognition software will mock up a before-and-after split screen and show where your ideal arches start, peak, and end. Full arches are still trending, but brushing hairs straight up is equally key for fall’s runway brows. Use a dry spoolie to coax hairs up and outward. Then, with a powder in a shade that’s lighter than your own brows, draw a straight line through the middle of each brow and blend. Sweep on a tinted gel to set the brows.