Steve DeRose's Road Warrior Guide: Tricks of the Trade

This document is not very organized. More a compendium of thoughts and ideas, some of which should prove useful.

If you don't have a printer available, but your laptop has a fax modem, you can send yourself faxes at your hotel (of course, Kinko's is usually only a short walk away too). Since they originate digitally instead of via scanning, they'll look a lot better than a typical fax.
Pack an extra, empty, collapsible bag so you have room to pack gifts, papers, or other things you rather enroute.
Balloons make great packing material if you buy anything fragile. Take them along uninflated, then inflate them as needed for padding.
If you have a machine with other than the typical DB-15 SVGA video-out connector, be sure you have an adaptor (if there's one in use at your desk, buy another to keep in your travel bag. Also be sure you know how to set your display to lower resolutions, and how to switch video out on and off.
Ship papers ahead to your hotel so you don't have to carry them. Or ship extra stuff home.
Double-check your cell phone on getting out of a cab. Cabbies tell me that's the most common thing left behind.
Always assume that cabbies have excellent hearing and memory.
Treat a person's business card with respect -- it's kind of standing in for them.

When presenting using a projecter

Know how to increase the font size in whatever application you're using
Don't use anything smaller than 18-point type to project. Almost never go below 24pt. Shorten the text, even radically, rather than break this rule.
If there's much text (like in an example), hilight the most crucial bits so a quick look from 50 feet back will still give them the basic idea.
Remember: perfection of design
Keep color schemes simple, and make sure your text doesn't disappear in places
If you use more than three fonts (headings, main text, and fixed-pitch stuff), be sure you have a very good reason for it.
Same rule for anything else: don't have many distinct left margins, or many line styles, or callout styles, etc. Unless you're a master artist, it will look either confusing or dumb.