If you want to use well your rational part of the brain, and apply delayed gratification, think about your ability to delay gratification as a dam.

• If you keep it open, the river of minor pleasures passes in any instant under your gates, and you get used to it.
• If you close it, the river will make the level of water grow, until it becomes a magnificent full dam. If you open then your gates, the pressure of the water will astonish you, as the pleasure you will get from the delay.

You need to use the rational part of your brain and persuade yourself to renounce easy gratification in the present, so you can have greater satisfaction later. And since you delayed the pleasure of the marshmallow for the moment, reward your fatigue with twice t...