You have a plan. A time-traveller from 2030 appears and tells you your plan failed. Which part of your plan do you think is the one that fails? Fix that part.
Procrastination comes naturally, so apply it to bad things. “I want to hurt myself right now. I’ll do it in an hour.” “I want a smoke now, so in half an hour I’ll go have a smoke.” Then repeat. Much like our good plans fall apart while we delay them, so can our bad plans.
Don’t punish people for trying. You teach them to not try with you. Punishing includes whining that it took them so long, that they did it badly, or that others have done it better.