I myself keep track of feeds (color, size, and sex offered) Shed, poop, weight, cleaning, if I add or change something. Check and track temps and humidity before work and before bed daily or every other day (to ensure no equipment failures), and the activity of the snake. Water dish soaks, e.c.t
I guess pretty much everything. I dont really use a chart, I just keep a notebook next to the enclosure and write very detailed observations... This may seem a bit much to some ppl but what can I say... I'm an over protective parent.

Then again for now I only have the one snake.