/r/ kenshiro jpg for acne.
Anyway the gist is not to eat junk (though I am not sure myself if it is a myth) and to keep a clean towel every day for sleeping on. You don't wash your pillow case every day and it gets dirty.
Don't wash your face so often but do keep it clean. If there's hair in your face keep it clean or tied back.
I get recurring adult-onset-acne and the pharmacist says there's no avoiding it. I was prescribed tetracycline when it got pretty bad, but try to push for accutane if you can afford it.