Trisk

If scrubs are irritating your skin, you might want to just get one of those "deep action cream cleansers". I use the clean and clear ones. I found that the neutrogena ones didn't really help me.
Everyone's skin is different. You should really just try the different creams/foaming stuff until you find one that works. And if nothing works and your acne is *really* bad, you can even go to a doctor and have him give you prescription stuff.

Junk food shouldn't be giving you pimples *unless* you're eating a lot of oily stuff and letting the oil sit on your face afterwards...because the oil from greasy foods is not good for your skin. If you're really concerned, you might want to rinse your face off after eating oily/greasy foods and working out so that the sweat/grease doesn't clog your pores and cause pimples. Another thing you should avoid is touching dirty/oily hands to your face. Dirt getting stuck in pores causes pimples....
Oil from your hair/scalp can cause pimples too, so even if you've just washed your hands and then scratched your head, it might not be good to touch your face.

And last but not least...don't touch your pimples....and if you do, don't touch any other place in your face. That can help them spread.