Don't stress—you don't need to be good at applying eyeliner to ace this high-impact makeup move. Grab a creamy, black pencil, then tight line your eyes. What that means: Rim your upper and lower waterlines (the fleshy part) with black liner. Why? This makes your lashes look longer and your eyes stand out, says Stewart, who likes to use Make Up For Ever Aqua Eyes in Matte Black 0L ($19, sephora.com).