20s: Try Anything Once
"In your 20s, you really can get away with pretty much anything," says makeup artist and brow expert Ramy of RAMY Beauty Therapy. "Heavy eyeliner, bright colors, super dark eyes this is the time to experiment."
One thing to stay away from? Permanent makeup, he advises. Other than that, "use sunblock and anything with shimmer. This is the period of your life where you need to experience trial and error."