The things that worked best for me were 1) more water, less soda, and 2) I made a HUGE HUGE effort not to touch my face. Ever. Ever ever ever. Don't do it. Seriously. It's really hard and I know that because I was there but it makes SUCH a difference.  (I even wash my hands before I wash my face now.)

Also, going on the pill helped a lot, but I had to come off for other reasons and I've stayed relatively clear.

Adventures in the land of the OTTB