don't skip blush

Especially if you usually just accentuate your cheekbones, cheek color might seem like an unnecessary afterthought. But don't skimp, says Martin, a beauty product artist who's worked with Claire Danes, Gwyneth Paltrow and Angelina Jolie, and says a bright blush can instantly give you a healthy glow that won't make you look will be exhausted. (Just make sure you know where to use it based on your face shape!)
Tip #1 for applying foundation like a makeup artist: Don't just use foundation. Instead, mix it with your favorite serum, cream and/or primer for a custom, seamless finish that keeps your skin hydrated and radiant throughout the day. You can mix your formula of choice before applying, or take Kelsey Dinihan's approach (she works with Kate Bosworth and Cindy Crawford): "I dab on my cheeks, nose and forehead A little Egyptian magic, then apply foundation as usual," she says. "There's no faster way to achieve realistically dewy skin."
Says Kira Nasrat, who has worked with Gwyneth Paltrow, Jamie Chung and Margot Robbie. "It really takes five seconds (or less), a step that many people tend to skip," she adds. "Plus, most people who curl their lashes end up using less mascara, which means more natural-looking lashes."

Grooming Brow "Sprouts" for Cara-Worthy Arches
You know those slightly unruly hairs in front of the eyebrows? Combing them up instead of brushing them back (or worse, tweezing them out—don't do that!) is the fastest way to give yourself a very natural "virgin brow" look. Use tinted gel for extra oomph.

Use blush or orange eyeshadow to warm up your eyes
"No Makeup" Makeup Tip: Even if you don't want a full eyeshadow look, just swipe on a sheer coral powder to add a touch of warmth to your eyes and counteract any blue tones you're looking tired.
Treats your lashes from every angle for an even application

Most of us just swipe mascara on from the base of the lashes, but Byrdie editors Lindsey and Deven make a good point: Unless you're also using the mascara wand above the lashes, you're not going to coat them evenly. Brush from the bottom to the outside, then from the top to the outside to develop the full potential of the lashes.
It means looking beyond your eyes. Nasrat likes to use concealer as a lid primer for her eyeshadow, and Deenihan has no doubts about the genius trick: "When I'm tired and need a quick refreshment, I apply concealer to the outer corners of my eyes and blend it into the ends of my brows. Eventually The effect is to instantly lift the eyes, tricking people into thinking you're really awake."