I have a pending task to tryout the COG [1]. The description makes it one of the best thought-through processes for me to write things down while not being a major time consuming event. Whenever I've tried in the past to take more notes, I'd had to plan a time to do it and it was very difficult to find time. Another problem I occasionally have is that if I write something down, my brain kind of let go of the most of the memory of it, so the more I write and organize, I feel more stupid.
[1] https://github.com/huytieu/COG-second-brain