I have a big whiteboard in my home office where I jot to-dos and challenges at the beginning of the day, crossing them off or working out thoughts as the day progresses. Even when I don’t share it with peers or clients, the simple process of brainstorming on the big, amorphous board is often very beneficial to the work process.
And of course my children picked up on some of this. My just-turned-ten son, who has been working on various Unity games for a couple of years, often leaves his own planning on the board, to my delight and amusement.
(I have verified that none of this is privileged or intellectual trade secret information)