Big tasks don't fail because you stopped caring. They fail because you can't see the finish line, and the next step isn't obvious.
So Inchmeal starts with something you can already do: point your camera at the problem, or write one honest sentence about it. Either way it writes a plan of about 12 steps, sorted into days, with a short note on what finished looks like. Then it hands you the first three. On a rough day you can ask for just one. The steps are small enough to manage when you have nothing left in the tank, and once you can see the pile getting smaller, the urge to keep going usually comes back on its own.
The mountain was never the problem. It only ever needed to be taken little, and often.