How Many Devices Do You Carry?S

Inspired by Tim Bray's recent post about how many devices people carry, I got to thinking: what's the best possible combination of electronic devices to carry right now?

Obviously we'd all love to carry a single device that did everything properly, but that's some way off. So, currently, when I'm out-and-about I carry a MacBook Air, a Kindle and my phone. It suits me well: the Air is for work; the Kindle purely pleasure. The phone is obviously a given, with me at all times.

But what do you guys carry when you're on the move? And what do you think the most efficient combination is, right here, right now?

Image by cowitz under Creative Commons license