Quoted from mof:1. Spiral Notebooks
2. At 15 games in the collection, I realized I was starting to forget what work I did on each machine.
3. I went to costco online and bought 20 x 70pp notebooks for like $23 shipped. I put one in each coinbox.
I use Google Docs:
Here's an example:
https://docs.google.com/document/d/1ciP4L9xbAmltDYNxKwO6n3toQu3jyg1bo_pgfI2X6Bk/edit?usp=sharing