Apply your regular concealer under the eyes and on any imperfections, using a concealer brush. If you have dark circles under your eyes, apply a pink or peach toned concealer first, then follow up with a yellow-toned concealer that is one or two shades lighter than your foundation.
Benefit Cosmetics has a great all-in-one kit called
Realness of Concealness(Compare Prices). The kit features
Lemon-aid, Boi-ing, and
Ooh La Lift, and a couple other great products.