As someone with ADD (+burnout and friends), this is the system I came up with for myself. It is moreso aimed at task management than day planning, but they are related:
I use colored post-it notes stuck to a whiteboard. One note per task, a rough time estimate to complete it, and the color of the note denotes the urgency (e.g. red = do today). I mark it with a ! if it is overdue/festering, and a ◆ if it is a difficult task (intellectually, emotionally, energetically, or otherwise).
The whiteboard has 6 rows: health, work, life/home, finance, education, projects. As I finish tasks, I put a big checkmark on them and leave them up for a bit (as proof to myself that I did something). When enough slain tasks accumulate, I crumple them up and Kobe them into the recycling bin.
There is not much of a planning phase—it’s just a continuous process of whack-a-mole-ing my tasks and generating new ones.
I use colored post-it notes stuck to a whiteboard. One note per task, a rough time estimate to complete it, and the color of the note denotes the urgency (e.g. red = do today). I mark it with a ! if it is overdue/festering, and a ◆ if it is a difficult task (intellectually, emotionally, energetically, or otherwise).
The whiteboard has 6 rows: health, work, life/home, finance, education, projects. As I finish tasks, I put a big checkmark on them and leave them up for a bit (as proof to myself that I did something). When enough slain tasks accumulate, I crumple them up and Kobe them into the recycling bin.
There is not much of a planning phase—it’s just a continuous process of whack-a-mole-ing my tasks and generating new ones.