Other areas of your life
I'd like to second TesTeq. With things I am used to and familiar with, I don't need projects or often even NAs because other factors will trigger the actions. Routines are easy and when you're good at them, they probably don't need to be tracked.
The real value in the whole system is in the new things. The new habit you want to take up. You lost your job in sales and the only opportunity you have now is in Nepalese cuisine, or the linguistics of Sanskrit, or Chiropractics, or inventing a lawn-mower that runs on water, etc or some other thing you have little knowledge/experience with.
Example, I currently have a responsibility to post updates to twitter for my company. I had avoided using twitter until it was required by my job. So, when it was first given to me, I didn't even know how to post, what "re-tweeting" was, how to follow, or any of the other aspects of twitter. For about a month, twitter was an area of focus for me with probably about 20 projects attached to it. My job required that I be perfect in my use of twitter but didn't really teach me how to use twitter (who's had that experience before, raise your hand). Then, as I got better and the learning curve broke, I was able to close down that area of focus and move it to just some projects in PR area of focus. Now I maintain the entire system with about five repeating NAs.
Now, moving out of work. How about the same thing with your relationships? Do you always know the "next action" with your wife (significant other) after a fight? How about your kids, your parents, you next door neighbor, etc. Or your finances? Are you a millionaire? Do you want to be? What do you want to do in order to get there? Personal hobbies? Didn't you used to love working on bicycles when you were younger? Health & Vitality? Do you really want to lose that tummy? Fun & Entertainment? Maybe expand to taiko drums or ancient chinese dance? Or ballet? Or deep-sea diving?
As David always says, as much as you need but as little as you can get by with. I don't need a project for every single thing that goes on in my life. But I do need projects for things that are new to me, that I can't predict, or am not sure what the next action would be for what ever reason.
Hope that helps!