One thing I couldn't live without...my camera.
I have been through several different cameras in the past few years, and honestly I am not picky about what camera I have (although I have been drooling for some time over the Cannon digital SLR's).
I love having a camera with me- and I do at all times. I have one that fits in my purse and I carry it with me always. You never know when you will pass something that you want to take a picture of. I take pictures constantly. A portion of them are good pictures...most of them aren't.
To capture a moment- whether it be the kids laughing, the fall leaves, the sunset, the sunrise, a building or animal is an amazing task.