Getting all my shit in one sock

[Chocolatl]

There's also the iPod Touch -- does everything but make phone calls.

I'll put in another vote for the smartphone. I used to be able to hold all my thoughts /to dos in my head, but now by the time I take two steps I've often forgotten where I'm going. I tried pen and paper, but I tended to lose them or forgot that I'd written anything down in the first place. I use the iPhone for jotting down pretty much everything, and my phone is much easier to find when I lose it, and to date has never gone through the wash. (Unlike pens, which explode, and paper, which ends up a little illegible gray blob in the lint trap.)