When in "busy" mode I always kept a to-do list on the screen, the electronic version of multiple post-it notes. No fancy software, just a basic word processor. Type task in with start date and move from to-do section to done section with done date when completed. Helped a lot to staying organized and making sure all activities got done.
I keep a combination Log and To Do list in OneNote.
At the end of the day I organize the list so that when I arrive in the morning I can just start executing, not organizing.
At the end of a week / month / year it's nice to be able to see where your time went. It's invaluable for tracking tasks handed off to colleagues or outside vendors.
I use other pages and 'notebooks' in the OneNote app to save more detailed technical and project info so that's it's all in one place.
I do the same as you - "nothing breeds success like success".
But I'm often unwilling to look at the to do list so I tend to re-discover it the next day (or later), and if I'm lucky I can put a line through some more items on the list.
I admit it; I do keep a list for work that helps me keep on track and reminds me of small tasks that otherwise would be ignored.
However, for personal time, a list only shows up in my routine when is a day full of interaction and obligatory items with third parties. I have a more restful day without a to-do list.