Quoth the Ryan "bring your camera with you?"
Not everywhere, I'll often put it in the backseat of my car when I'm going out, just in case I encounter anything interesting. I really hate those moments when you're out and see something you'd really love to take a photo of, yet you have not means of doing so.
Bringing my camera along in my car allowed me to grab this funny shot at a stoplight. A miata and a Hummer in my rearview mirror, one towering over the other.