9. Don't ever step foot in a tanning bed. Don't even think about it. It’s never okay, not even once or twice a year. The UV radiation in tanning beds is 12 times stronger than the sun, and they increase your risk of melanoma by a whopping 75 percent. Not to mention that they speed up aging and turn your skin into a leathery, wrinkly mess. Seriously, it’s not worth it.