Studies prove that people are more likely to stay on track when "eyes are watching them." A mirror on the refrigerator, and one in the pantry, may subconsiously reduce snacking, sneaking or binging. PLUS, looking at yourself will remind you of your goals and help make that decision on whether you are going to snack or choose another option when you are not truly hungry.
Even better, put your "goal picture" BESIDE the mirror to remind you where you are heading.
Adam Alter's "DRUNK TANK PINK" explains the science to this behavior. A good interview:
Also, the book "NUDGE"