If self-discipline is the ability to make yourself do what you should do, when you should do it, then habits are the ultimate hack. Habits allow the brain to conserve energy.
Neuroscience reveals : “Neurons that fire together, wire together.”
This is the brain’s "executive center". It handles complex planning, rational decision-making, and long-term goal setting. When you choose to exercise instead of sleeping in, your PFC is in control.