The appearance of your skin can be greatly affected by your lifestyle habits. Here are a few tips that have helped me keep my skin as youthful as possible.

Turn that frown upside down! When you frown or purse your lips, you tense your facial muscles, creating lines with the repeated movements. This results in marionette lines (also called puppet lines) and those pesky vertical lines around your lips (also known as smokers lines, though you don’t have to smoke to get them!).

Take it off! (Makeup, that is.) Sleeping in makeup is a cardinal skincare sin. You can block pores and trap oil, leading to breakouts, bacteria and dead skin cell buildup, and enlarged pores. Yuck! And the effects aren’t just aesthetic: Sleeping in makeup can cause premature aging.

Don’t puff! It goes without saying that smoking is bad for you. Not only can it cause cancer, emphysema and a host of other health problems, smoking creates wrinkles around the mouth and lips. Crow’s feet and lip lines result. Not very pretty, is it?

Get some sleep. Lack of sleep affects skin elasticity, coloring and lines. Adults needs at least seven hours of sleep (eight is better) for skin cells to regenerate. If you don’t, your skin will look puffy, hollow and saggy. And nobody wants that.

Wear a broad-spectrum sunscreen daily. It doesn’t matter if it’s cloudy, rainy or snowy. UV rays can pierce the clouds and cause sun damage. Studies show that incidental sun exposure—getting in and out of your car or office building, driving, walking your dog, etc.—all cause damage to your skin. Protect it with SPF 30 and reapply as needed.

Take your vitamins. Good nutrition in the form of vitamins and minerals keep collagen production in your skin at optimal levels. Vitamins C and E and fish oil are all particularly good for youthful skin. Try to get them in food, as well.