Melissa's question about beeturia got me thinking about how we can use indicators at home to track our health.
Stool quality is a good one, following the bristol stool scale and noting color, frequency, timing, etc. As a person with celiac disease with IBS-type symptoms, my gut is very quick to let me know if I've eaten something wrong. Here's a related PH question about stool.
Stool timing may potentially be an indicator of cortisol levels. Since many people experience a bowel movement in the morning, coordinated with high cortisol levels, then stool timing could potentially be a way to track cortisol levels.
I have asthma, and I use my frequency of albuterol usage as an indicator of inflammation, all else being equal.
Other measures may be sleep quality, mood, exercise performance, mental clarity, and weight changes. Dr. Kruse has a related post up about things to look for at home on his blog.
What indicators do you use to track general health, or progress towards a health goal?