This isn’t rocket science (though the book Think Like a Rocket Scientist is brilliant) but wrote stuff down and have a framework when you do.
Check lists where the list doesn’t have sub categories that help organize things into a valuable system for you end up becoming unwieldy.
Frame things before you organize things and you’ll move faster and train your brain how to think more effectively.
Note: Bullet Journal sounds great. I know some people at work who do it. For me the key is having a methodology and way of thinking that reflects your goals and values and then, organizing your day and work and wants against and into that framework.
And if you can start in groups of three well, I’ll love ya more.