Willpower is like a muscle. It gets stronger with use. Buying a copy of GTD might help, but it won't be an instant cure. There is none. Also, consider exercis

Willpower is like a muscle. It gets stronger with use. Buying a copy of GTD might help, but it won't be an instant cure. There is none. Also, consider exercising your willpower on smaller (but non-trivial) projects.