The "throwing backpack over wall" mental model, originating from William Knaus's book The Procrastination Equation, is an effective technique for overcoming procrastination. The central idea is that when facing a task that must be completed but which one continually avoids due to hesitation or excuses, instead of delaying further, one should take a radical step—deliberately placing oneself in a situation with no way back. This is analogous to throwing your backpack over a high wall, forcing yourself to climb over to retrieve it. The model emphasizes leveraging external pressure or self-imposed commitments to spark internal motivation, aligning the rational mind, emotional brain, and reptilian brain toward a common goal, thereby overcoming inertia and taking action.