Update: [[Five Things]] is meant to help with this sort of thing.
So at some point you migrate from little scraps of paper to sheets of paper.
Then you migrate to notes in your computer.
Then you migrate to a documentation system.
Then you migrate back to notes in your computer.
Then you migrate to one big note.
Then you categorize your notes.
Then you review and prioritize your notes.
All the while, your notes have been gathering strength, preparing to assault your free time.
You open the flood gates .. and .. nothing happens. The very notion of a list is intimidating, and actually "doing" anything is based on inspiration. Priorities have shifted around so much over the years that looking at the list just gives a lot of "yeah, that ought to get done one of these days" instead of the burning-hot passion there used to be.