Bullet-journaling works because, as the creator of the method says, knowing that there is a place you can dump all of your mental clutter frees up a lot of brain space.

Also, carrying it around means that whenever there’s some unexpected free time you can work on one of your projects. A lot can get done in that way.

I’m chairing a committee with a very complicated, multi-stage task, and it’s 5 times easier now that I bullet-journal than when I did it last time.