First-time FAMer, started charting this month. My chart, which I printed off the net (gardenoffertility, IIRC) has a "misc" category for noting down non-cervix-related things.
I know some women note down their mood, if they've taken a multivitamin that day, if they exercised and so on. Some things are observational, some are motivational (a Christian lady I know of marks down her daily devotions!).
I like the idea of charting "extra" things out of geekery - I was thinking energy level, productivity or maybe even MDC-free days (trying to cut back!). Any other ideas? What do you chart?
If decomposition persists please see your necromancer.