That's the kind of thing you can do with a Franklin Planner. The reverse, as a matter of fact, is one of the things Hyrum Smith advocated in his book on the planner, 10 Natural Laws of Successful Time and Life Management. He talked about being able to trust your system (similar to David Allen) and how if you write things down and check every day, you can.

He talked about meeting with a guy and the guy said, "We should talk again sometime this summer," and Smith opened his planner and asked, "When?" The guy was kind of amused and Smith said, "Six months from today?" Wrote it down, then asked the guy what time of day was best for the call. Sure enough, the day came and at the appointed time Smith called the guy and said, "Hi, this is Hyrum Smith." And the guy was gobsmacked.

So that kind of notetaking can be helpful both backward and forward.

In the "backward" vein, I became a devotee of the planner when an insurance company was running me in circles. Instead of having post-its and scraps of paper that kept getting buried and lost, I wrote down the details of each phone call on the calendar section of the planner. (I had a two-page a day planner, so that the calendar/to-do list was on the left, and the right was a lined page for whatever notes I had.) When somebody at the insurance company tried to tell me something I knew was wrong, I finally flipped through the planner and said, "On this date, I talked to =name= at 2:37, and SHE told me .... and then on this date, I spoke to =name=at 4:51 and HE told me .... and finally last week on the 7th I spoke to =name= and SHE told me ... now are you really going to do this again, or do I need to talk to your manager?"

It's amazing how fast I suddenly got stuff done. Just having names and dates (i realize the times were snarky, but I was royally irritated by that time) suddenly made me armed and dangerous.

Sorry to digress. I'm still a fan of the Franklin Planner, obviously.

One thing you might like is another detail from the FP -- At the front of every month is the monthly calendar, and then there's a "master task list." That is divided in two columns, on side for personal and the other for business -- major tasks to be worked on that month. For January I have "clean office," which I'm now using GTD to implement. I don't know if this fits with GTD philosophy, and I don't always use it, but when i have major projects I want to get done it does help to have them written down as a reminder.

It sounds like a fun project. I hope you post photos.