What you can do differently: For starters, stop going to tanning beds. Period. And if you are in the sun, make sure to slather on a titanium dioxide- or zinc-based sunscreen (these are natural sun protectants and their formulations usually contain fewer chemicals, so they won't break you out as easily), and wear a sun hat or ball cap to shield your facial skin from harsh rays.
Acne (acne vulgaris, common acne) is a disease of the hair follicles of the face, chest, and back that affects almost all teenagers during puberty -- the only exception being members of a few primitive Neolithic tribes living in isolation. It is not caused by bacteria, although bacteria play a role in its development. It is not unusual for some women to develop acne in their mid- to late-20s.