"If you are a medium skin tone, go a little more ivory in color," Scantlin says. "This way it won't wash you out." Choose a highlighter with a golden sheen if your skin is a darker medium shade.

On darker skin, color shows up much more saturated, which can work against you when highlighting, says Guilis. Steer clear of white or frosty highlighters because they give darker skin tones a gray, ashy appearance, says Scantlin. Opt for red-based products (think: coppery bronze) and golden highlighters instead.

With the matte trend going strong, sometimes even a little glimmer can seem OTT. Choose a concealer about two shades lighter than your skin tone and apply it over the areas you would apply a shimmer, and then balance it out by applying a foundation two shades darker than your skin tone right under your cheekbone and blending. "This way you have lightened the area without shimmer, and it's just as beautiful," says Scantlin. Another easy way to get glowing sans sparkle? Use a tinted moisturizer, which adds luminosity without the shimmer, says Barose. He also recommends avoiding powder on the bridge of your nose or the top of your cheekbones to let your natural glow show.

We know we advised against lots o' shimmer earlier, but at night, (almost) anything goes. Guilis says that you can amp up the shimmer in the darker hours. But remember: The point of highlighter is to mimic light hitting your face in a flattering way, so put highlighter on the parts of your face that would naturally receive the most light, such as your cheeks, nose and brow. If you have a feature that you don't want to emphasize (like a prominent nose), avoid putting anything gleam-y there. Bonus tip: Apply highlighter to your eyelids at night. Guilis promises this will give you a glow you just can't get during the day.