I have notebooks and I make notes after each trial for each run, with the pros and cons of each run.
If the course was messy or we had problems, NQ etc, I put the course map in the notebook.
I put red stickers on the page in the corner, that way I can flip through the book and easily pick up on the problem courses/runs and then work on those issues.
I also have blue and green stickers that go beside the other stickers, blue is for handler error issue and green is for a dog issue.
I use gold stickers for the nice runs. My goal is to see more gold than red lol.
At this point the gold is starting to win and the blue out numbers the green. lol