30s: Start with a Serum

Since the first signs of aging usually happen around the eyes, you may start to see some differences in your thirties, warns Bank. "On top of the beginning appearances of crow's feet, you'll notice that your skin is drier and duller in color. This is because the rate of new cells being produced by your skin is starting to slow down."

Bank recommends investing in an eye cream to rejuvenate the skin, like Neocutis Biogel or a serum, like Lancôme Rénergie Microlift R.A.R.E Eye Serum to help tighten fine lines and brighten up dark circles. "Stay away from eye creams with sodium chloride or isopropyl myristate, as these ingredients can irritate your skin and lead to excessive dryness," says Bank.

Neocutis Biogel, $148.50, skincarerx.com

Lancôme Rénergie Microlift R.A.R.E Eye Serum, $70, neimanmarcus.com