"The business traveler should bring only what fits in a carry on bag. Checking your luggage is asking for trouble. Add several travel-size packets of detergent so you won't fall into the hands of unfamiliar laundries. There are very few necessities in this world which do not come in travel-size packets. One suit is plenty if you take along travel-size packets of spot remover. The suit should be medium gray. Gray not only hides the dirt but is handy for sudden funerals. Always bring a book as protection against strangers. Magazines don't last and newspapers from elsewhere remind you you don't belong. But don't take more than one book. It is a common mistake to overestimate one's potential free time and consequently over-pack. In travel, as in most of life, less is invariably more. And most importantly, never take along anything on your journey so valuable or dear that its loss would devastate you".