Dark circles under the eyesEven if I don't wear makeup at all, I always apply concealer under my eyes. I work on a computer all the time, drink a lot of coffee, don't get enough sleep, and wear contact lenses. All of these bad habits show up on my face and need attention even on my best skin days. Additionally, my skin is very dry and the eye area is no exception. So, I always make sure to use a concealer that not only covers dark circles but also hydrates my skin. Also, as I get older, I make sure to apply a good moisturizer under my eyes twice a day so that concealer doesn't cake up under my eyes. My favorite: BENEFIT COSMETICS Fake-Up Hydrating Concealer is a perfect two-in-one product as it effectively hides dark circles and smoothes the eye area. I also love the unique look of this product: it looks like a clear lip balm with a concealer part in the middle. You can apply this lightweight product directly under the eyes, using your ring finger to ease pressure, then lightly blend the product upwards. If you're new to the concept of concealer, this product is definitely one to start with. Also try: BECCA Under Eye Brightening