I have learned to copy the pattern and use the copy to write on. I check off each item done. Make note of any changes to the patterns-especially to simplify the steps. I staple swatches of the fabrics to the pattern. I make notes-lots of them. I know someone may inherit all my stuff or borrow them, and if they want to do those patterns, I hope I have made it easier for them. To me it is more organized than having scraps of little notes laying around.
Started doing this because I too have done the same thing you have more times than I care to tell.