Last year, Americans took more than 457 million business trips, with 38 percent of those travelers heading to a meeting, according to the U.S. Travel Association. Of course, first impressions make a massive difference in the success or failure of a client relationship. So the question is: How can you win friends and influence people when all you’ve got is 30 minutes and the clothes on your back? Here's the ultimate tool kit. And it fits in your jacket pocket.