Notebooks are great. But with my writing and lettering, sometimes I can not read my own notes. I've been using an "Excel" file to keep all my autocad command notes and comments on. This way if I can not remember exactly what I am looking for, I can do a search on a keyword and get close.
This has also worked on the numerous passwords that I use for different applications.
Comments and ideas are good, that's how we learn. Keep it up!!!!!!!!!!!!