I also kept notes in my day planner on encounters with my H starting after BD. I slacked off a bit after the first year (jeez!) but am trying to get back into it now. I note things like date, time, length of interaction, means of contact, anything new or relevant, his mood, etc. It does help to look back and see things in B&W, and it doesn't have to be a lot of writing. I usually just jot down a few key words, or even draw a happy or sad face. Sometimes our memories can be tricky.