Some beauty tips are ageless. Whether you're 19 or 90, you should heed the wise advice about always wearing sunscreen, drinking plenty of water, never smoking and regularly exercising if you want to keep your skin's appearance in tip-top condition. However, not every piece of beauty advice is as evergreen. Just as your face and body change as you age, acquiring wrinkles and age spots, so too must your cosmetics regimen. The products you worshipped in your 20s and 30s may no longer do the trick -- after all, how many things from your 20s still do? Let's investigate some makeup and beauty tips that will help you put your best face forward.