I was just thinking....asking procrastinaters for help might take a while to get responses
I am the same way, not for any childhood reasons that I can think of but, I think I do it for things that seem overwhelming to get completed. I know it's partly being somewhat of a perfectionist and also just lack of time so I tend to do the things that I know I can start/finish quickly and put off the more difficult things even if they are a higher priority. I have been better at letting my husband know when I'm doing it and why...
one example is my car...it's been leaking oil...I got an estimate. They did a thorough test with dye and found it leaks in 2 places...but it's been months and I still haven't made the appointment to take it in...because I keep thinking I'll shell out the money and the car will still leak and then it will become a nightmare for me to deal with...My husband said he'd call and make sure whatever we pay them is to fix the leak, not just the 2 spots they found and if they can't guarantee that, then we will go somewhere else. So he has been able to help me in that way, but if he nagged me about it I think it would go directly to the bottom of my list because it's stressing me out enough already.
I guess it comes down to breaking down the tasks that get put off and figuring out what about them is causing them to get on that list and see if your wife can help you with getting them done.
If it's more of the honey-do list type of stuff, I guess the list might help (at least she will only have to ask once) and dry erase isn't bad because she can put priorities on things as they get added...then you could plan up front to get certain things done by certain dates.