Now it's time to fill in your eyebrows. First, use a small, angled eyebrow brush (like Make Up For Ever 270 Angled Eyebrow Brush, $21) to apply the darker shade of product on the under side of your brows. "The best place to start is under the arch," says Van Jones.

Then, continue filling in outward toward the tail. "Most people's brows aren't thick enough at the tail," Van Jones explains. "But this is the part of the brows that frames the eyes — it's the most important."

You may need to lower your arch — the shape should be angled and rectangular, not rounded. "If the arch is too high, it makes you look pissed off — and nobody wants angry eyebrows," says Van Jones.

Image via Imaxtree

Once the arch and tail are filled in, use your lighter brow color to enhance the top of the brow.

"The analogy I use is lip liner," says Van Jones. "You want to focus on that outside edge and less on the middle of the brow. That gives you a more natural look and makes the brows seem bigger."

The reason for two different shades? "That's the way light naturally falls," says Van Jones. "Lighter on top and darker underneath."

Image via Imaxtree

Like many people, one of my brows starts further from the bridge of my nose than the other, and I need to fill it in to match. "That part is the hardest to fill in," says Van Jones. "Use the lighter color of shadow and turn the brush sideways so it's perpendicular to the brow." The line should go up and down, along the bridge of your nose.

And you want to be sure you're starting it in the right place. "It should line up with the middle of the nostril," explains Van Jones. "Not the outside of the nostril — that's too far apart."

Image via Imaxtree

Here's your last step in mastering how to shape eyebrows like an ace. After you've successfully filled in your brows, use a brow gel to hold them in place.

Starting in the middle, brush the hair straight up, then pull the outer section (the tail) outward. Try Sonia Kashuk Brow Gel, $5.99, or Glossier Boy Brow, $16, which has a thickening formula and comes in three tints.