I cannot even count how many stories I have heard regarding sleeping in your makeup. I know that we all get tired, but taking off your makeup is more important than putting it on. Make sure that you give yourself time to properly clean your face, it doesn't matter if you do not wear a full face of foundation. Makeup needs to be removed in the evening. You want to clean off the makeup (remember-no soap, it dries the face), baby lotion works great, be careful not to get it in your eye. After that you can use a gentle exfoliant, make sure its gentle for everyday use. There are some exfoliators that can be to harsh and should only be used once a week. The final step is to moisturize (no matter what your skin type). Think of yourself as an artist, you want your makeup to accentuate your features, therefore as an artist you need a clean canvas to express your ideas and create beautiful works of art.