I think best in spreadsheet form.
I do almost everything in Excel: my five year plan, my grocery list, my calender, my budget, and every weekend I put together a weekly food & exercise plan for the week ahead. The week never pans out exactly as I plan, but it’s a starting point.
Here’s a glimpse at the inner workings of my painfully neurotic mind:
(If you’re actually interested in seeing what it says: click on the image, it will enlarge in a new page)