Because reapplying can be tricky throughout the day, try spray-on sunscreen, such as Supergoop! (Re)setting Refreshing Mist SPF 40 ($32, supergoop.com). It gives you a refreshing boost while protecting your skin from the sun. After the rest of your makeup has set for a few minutes (damp skin will lead to streaky application), swirl your brush over the top of the compact and tap off any excess on the back of your hand. Sweep the brush along your temple, down toward one cheekbone, and then to your jawline, completing a number “3” figuration. Repeat on the other side.