Something you don’t leave the house without.
And the answer is.... my cell phone. It sounds a little crazy, but it's so true. The only time that I don't have my phone with me is when it's charging and I have to go somewhere, other than that it's within 3 feet 24/7. Of course, I don't use it the entire time, but I like to know where it is. I've always been that way though, and I use phones until they wear out..... because of my luck that's only been for 2 years at a time. Maybe that's the way the phone companies set it up, typically after your 2 year contract you are eligible for an upgrade, but you do have to renew that contract with a new phone.
Anyway, back in March I got my first 'smart' phone, the BlackBerry Torch. I LOVE it! It has everything that I need, and more!