Heart Beat: Portion distortion
If you are trying to lose weight, let your eyes do some of the work. The Ebbinghaus-Titchener size-contrast optical illusion might help you choose smaller portions that can nudge your weight in the right direction.
In the illusion, identical circles (the white ones) look larger or smaller depending on what's around them. How can this help you eat, and be satisfied with, less food? The trick is in your kitchenware.