There is a lot of discussion about how to photograph responsibly lately. But file management is also extremely important. I relied very heavily on this sheet above for keeping my cameras and files organized. I also, by labeling my cards, was able to keep the photos taken by my second shooter identified and separate, important if there is a dispute over who took that award winning image.
Lastly, the sheet above can really protect you if you get sued over lost images. A judge will understand that mistakes happen, and that with such diligent record keeping of your image files, it will show that you are anything but negligent.