Cosme

I'm a beauty editor and yet it took me years to figure out how to apply eyeshadow that:

1. Wasn't crooked (mismatched eyes!)
2. Wasn't too dark or blotchily blended (yes, I know "blotchily" is not a word)
3. Didn't extend to the wrong, wrong, wrong upper reaches of my eyelids

After years of seeing makeup artists in action and learning numerous eyeshadow tips and tricks, here are my 10 favorites I wish someone had told me twenty years ago:

Secret #1: Blending is key

Ok, well I sorta knew this, but I wasn't sure HOW TO BLEND. You use three different colors: The base, usually a very light taupe, a highlighter for the crease and a main color for the lid, but how to get them to look as if they merge into each other like the colors of a rainbow? My secret: Start light then go darker. Brush the base color, apply the lid color and THEN apply the highlighter. Also, don't be too heavy-handed or you'll have to start over. Extra tip: Practice makes perfect. Play with your makeup a few days before a big event.

Secret #2: Choose shadows that make the color of your eyes pop

Gone are the days when beauty experts advised against blue shadow. Matching the color of your eye with a shadow actually brings the color out (think blue shadow on blue eyes). At the same time, contrasting colors make eyes pop too (think a deep jeweled blue shadow on deep brown eyes).

Secret #3: Never cover your browbone with deep color -- unless you're doing a cover shoot for Vogue

You don't want the drama too much shadow brings. Apply shadow up to the browbone but don't apply shadow ON the bone unless it's a neutral color or a highlighter.

Secret #4: Highlighter can make or break your look

When applying dark shadow to the crease of your eye, be careful to blend only on the outside edge. Get to close to the eye and you'll cause your eyes to look teeny and beady.

Secret #5: Set shadow with a great base

Primers are super hot right now because they help set makeup that stays for hours. I've found the secret to keeping shadow in place for hours is a shadow base. Almost everyone makes them but I swear by MAC Paints.

Secret #6: Shimmer is hot, but plays up wrinkles

Shimmer makes eyes really pop, but it also highlights heavy lids, lines and wrinkles. A great look for shimmer is to create a 'nude' lid, but apply a bit of gold shimmer to the browbone. Gorgeous!

Secret #7: Smokey is great, but keep it to the lid

Making up a smokey eye? Keep color to the lid and just under the lower lashline. Don't extend color above the crease.

Secret #8: How to pair shadow with red lips

Remember the beauty rule 'Thou Shalt Not Play up the Lips AND the Mouth.' If you're going for dramatic red lips (never out of fashion), cover unsightly blue lines on lids with a concealer or shadow primer and then keep eyeshadow light.

Secret #9: Make eyes brighter with white

A dot of white shadow or pencil on the inside of the eye near the tear duct will make eyes look brighter.