If you're heading out to the beach over the long weekend, you may want to slap on the sunscreen before you step foot out of the house. The Centers on Disease Control and Prevention states that it takes up to 30 minutes for sunscreen to be absorbed in the skin, so do your best to time your arrival to the beach just right.

Then, once there, be sure to constantly reapply every thirty minutes or so. On average, most SPF 30 sunscreens last just over 30 minutes before their UV-blocking properties begin to diminish. Also, even if a sunscreen is labeled as "waterproof," it's still wise to apply more after going for a dip, especially if you towel off afterwards.

Opt for sunscreens that are at least SPF 15 and protect against both UVA and UVB rays, and always remember that taking a time out in the shade once in a while is never a bad idea.