Tip number 1: "This Camera Belongs To..."
My GPS has a memory card that I copied the same photo too. So if I lose my GPS, they will see the same message. I changed the message to say "This Device belongs to..."

My personal tips:
1. Take a photos of your home project. My sink was leaking, I needed a new drain pipe. I took a photo of it and took it to the hardware store to find the correct parts.
2. Take a photo of a photo. My wife's grandmother had stacks of old photos. I was able to take shots of each one. We then put them in a digital photo frame and displayed the frame on the mantle. They weren't perfect, but the look great in the digital frame.

All these tips are great, I already used my camera for one or two on this list... But for now my cam doesn't have that much use because the screen got messed up, and until I get my hands on a tri-wing screwdriver, it will stay that way :(

A tip I would add:

As a college student, I use my notebook computer for taking notes, and I often find myself slowed down by complicated drawings and formulas that the teacher puts on the board; so I take a picture of the board and when I get the chance I paste the picture where it belongs in my notes.

Fascinating. And free if you have a cam already. Love it. Still trying to figure out the wood chipper pic, though. What, are you about to throw something/ someone in it?

Another use is for medical diagnosis. If you have a rash, hives, or any skin problem, take a picture as the symptom may be gone before you get to see a doctor.