A silicon based foundation also makes your makeup last longer. Picking the right color of foundation is also hard, so the best way is to test it out on your neck instead of on your face so that your neck and face match. Rub in the foundation a little bit to get a truer color. SPF in foundation is an added bonus. 30 to 45 SPF is the best for foundations. Apply lotion to your skin so that your makeup will set in.