If you have a stash of unused or about-to-go-bad beauty products at home, here are some easy tips to save them before they end up in the trash. Foundation that is too dark for your skin tone can be remade into a bronzer for your legs -- just mix it with moisturizer and apply to give your legs a sun-kissed glow. Old perfumes can become room diffusers -- just leave the caps off, and they'll gently evaporate as air deodorizers. And nail polish that's dried up in the cap? Add a few drops of nail polish remover and shake -- it'll loosen the paint and make it as good as new.