Sounds like a bit of a chicken-and-egg problem. My main issue is to even get myself to sit and stare at the work to be done. It has been really frustrating seeing the lengths I go to, consciously or unconsciously, to procrastinate.
This confused conviction is the real problem. There is no other you to convince. The same you that you are bargaining with to do the thing is the same you that's doing the bargaining. You can at any moment just do it.