I don’t want to go ordering stuff off the Tv with a credit card; but I’m more concerned with the food I eat. Are there any foods I should avoid? Or possibly activities I should stay away from (playing out in the sun, etc.)? I’m currently 15, and shall be 16 this December.

Sorry but everyone has different reactions to everything you try for acne. I’ve had it for over 6 years and personally, stuff like Burt’s Bee’s acne wash works pretty good but every now and then I still get new acne..it sucks. I’ve been to dermatologists, doctors, you name it. I’ve tired everything, including proactive and even this stupid thing http://myzeno.com/ (don’t waste your money, you put the thing on one zit at a time, doesn’t make you not get break outs in the future, so otherwise..pretty pointless.)
Another thing, just because something is "FDA approved" doesn’t mean you should trust it. I suggest you try natural stuff. It’s been shown that fish oil ( vitamin form ) helps clear skin up. When it comes to food, just EAT HEALTHY. You should anyway! Avoid GMO foods, chemicals you don’t know the name of and fake sugars. no pop, energy drinks, or alcohol. do NOT drink diet pop! aspartame is in it and is horrrrrrible for you. and avoid MSG which is in surprisingly a lot!