Post-Its in the Pantry:
Find yourself opening the refrigerator door and eyeballing everything (as if you don't already know what it's stocked with), perusing the pantry, and riffling through the freezer, even when you're still full from dinner? I do. Waaaaaay too often. I am great at late-night self-convincing that enjoying a few (or a heaping handful) of M&Ms is "okay" and that, no, I won't regret it in the morning... Instead, I place Post-It notes with little reminders that I shouldn't eat that cookie, alternatives to eating that cookie, and, worst case - the result of eating that cookie: weight gain.