Hi Bettina-
It all starts with simple effective skin care. If your skin is oily, I recommend using Gel Cleanser--the formula will leave your skin feeling clean and refreshed with out any greasy residue. Use it twice daily and follow with a mattifying lotion (try Shine Control Hydrating Face Gel) to help control oil production. To get rid of dark circles under the eyes, start with concealer (one shade lighter than your foundation), apply where needed and set with Face Powder. Smooth Oil-Free Foundation in your skin-tone-correct shade over your face to cover any blemishes or redness and follow with powder. One last hint, carry Pressed Powder in your purse for quick touchups throughout the day.