You can even integrate both of these: Recently, if my wife nags me to do something, I set up an automated reminder for it. For instance, in the D&D setting specifically I have automated reminders of:

Use smaller dungeons. Preroll random encounters. Avoid boring intersections.

But I have other interpersonal reminders as well.

I used to use Beeminder for exercise and it worked, but my wife wasn't into it and wanted me to stop because it was getting so focused on what I was Beeminding I was annoying her when I was saying things like

"Oh no, I have to spend time lifting weights once we get home from this party because I have no slack time today and I'll fall of the yellow brick road if I don't!"

But yes, Beeminder is certainly worth trying, for sure.