It depends on what moods tend to be issues for you. For me, in the days when I was tracking, I always noted depression level, anxiety level, and irritability as those were always good indicators of my general wellness. I also tracked sleep, activity level, and made note of stressors to see the correlation between what was going on in my life and how it was affecting my mood.

If you want to actually have charts to fill out, you can find ideas online. I finally came across an app I really liked called Optimism Online: Optimism Mental Health Apps for Self-Tracking. There are MANY apps out there. This one you can use on a regular computer as well as on your phone or other devices and they will sync. It is customizable so you can very much personalize it for what you need to track. You can journal on it, etc. There are simpler ones and different ones; this is just the one I found I always went back to no matter how many others I looked at.