Gadgets, gizmos, and tools to help make you more productive in business

I'm starting a series on mobile office necessities. I feel that most of the time, our work takes us on the field and we tend to bring a good book to read to pass time. On other occasions we grab our "business black book" to make important notes and organize our thoughts. Though these are well and good, I'd like to give a few simple tools to maximize our work without wires.

Here's a series on a dozen or so accessories which we can use to keep efficient despite our "roving office." The purpose of these gadgets is to ensure that we experience the least amount of downtime.