4. Brush Your Teeth!

Have you ever brushed your teeth and then eaten something that you would normally find delicious, only to find it horrible and sour? That's the toothpaste effect.

This is a really useful way to curb your appetite, not because it naturally suppresses your hunger, but because knowing your teeth are lovely and clean will make you less likely to “dirty” them by eating! Also, if you do eat after brushing your teeth, the food will taste sour and it will act as negative reinforcement, meaning next time you will feel less tempted to eat after brushing, and thus skip a snack! And did I mention your teeth will look great?