Though a beauty editor would never recommend skipping sunblock entirely, you might want to go easy on the SPF if you normally wear one every day. The camera flash can be your friend, but it'll pick up sheen from products with heavy sunblock. Go for a tinted moisturizer or foundation with an SPF of 20 or lower to avoid the white coating that can come from strong sunscreens or makeup.
Oh, so your iPhone 5 has a thousand megapixels that expose every detail on your face? Not a problem. Use a high definition foundation that has specific light-diffusing formulas and thinner ingredients that won't show up on film.
Smashbox Liquid Halo HD Foundation SPF 15, $42, Sephora.com
Feel free to go slightly more heavy-handed with your makeup than you normally would. Unless you're Annie Leibovitz, the camera isn't going to pick up that no-makeup makeup look quite the way you want it to. A selfie is the perfect time for a rich, bold lip or a smoky eye—just pick one area at a time to play up!
You want to take the shine down a notch, but not look too powdery. Finish your beauty look with a loose dusting of sheer setting powder on your T-zone. Or, simply use blotting sheets to get the job done in a pinch.