Last night, I was staying at a hotel in Houston. My cell phone was running out of juice, and I had forgotten my charger cord. I called down to the front desk and asked if there was a store nearby where I could buy one. The person on the phone asked what my problem was, and when I confessed my poor packing, she asked what kind of cell phone I had. When I told her, she said she would have a charger brought up to my room. Three minutes later, my phone was charging.
Now, if a client was in your office, how many of us could offer this kind of service? Its a little thing to have a bag full of charging cords, but it would be nice to meet that need when it arises.