I too keep records....
Each snake and now my beardie have an Excel spread sheet which has the following:
a top line with the name-sex-morph, hets-bred by, purchased from, purchase location-cost
then from left to right there are the following sections:
date, snake weight(gms), food weight(gms), food type & Qty, Flukers Cal & Vit D Powder, NutriBac, Regurge, Hrs to post feed poop, shed, notes (this is where I note anything that is not covered in the other columns) For the columns Flukers, NutriBac, Regurge & Shed, I simply put an N or a Y to indicate whether or not the item was used or the event occurred.
If I only knew how to put a screen shot on here I would and it would make so much more sense.
I also go one step further and every couple of weeks I do a print preview to see if I have another page of care log info filled up and if I do I print it of, this is a safe guard as I had my laptop crash once and lost all of my snake files for the 5 snakes I had then and my tech was only able to recover bits and pieces of the files. Now that there are 17 snakes and a lizard, I would be devastated if I lost it all again!