I used to go to the extreme with record keeping. I tracked everything on the computer. Now pretty much everything that I care about gets written right on the tub in sharpie. If it is information I want to keep, when I run out of room it gets transferred to notebooks, and then cleaned off the tub with alcohol. I don't have display animals so I really don't care what it looks like and I have all the information right there in my face when I am evaluating an animal or getting ready to feed.