Obsession with tanning. Though too much time spent in the tanning booth can cause cancer, many people throw caution to the wind when it comes to the tanning salon. Scientists have discovered that the same ultraviolet light that causes skin to darken also activates endorphins and other stress-busting hormones. If you spend an inordinate amount of time in the tanning booth, do your skin a favor and find another way to deal with your stress. Exercise would be a much better choice. Not only does it release endorphins, but it also helps your body to work more efficiently, which can help you better tackle stress in the long run.