Semper Fi, when I first got my 68 bird, I made a to-do list that was three pages deep, single spaced!! I still have that hand-written list and keep it in my envelope of important car paperwork for this bird of mine. Its a great historical car document in my opinion, and tracks jobs done and parts teplaced by date and source.
So, keep all those doodle lists and plans sheets for historical purposes.
'68 428 HO M3 Monster, 4-on-the-floor! Need I say more?