Of all the essentials to bring when traveling, packing a color copy of your passport just might be one of the savviest; especially when you're traveling internationally.
It's a good idea to have a backup copy of your passport, just in case you lose it on your travels. That's because if you misplace your passport, some places will accept the copy in lieu of the original and you'll also be able to speed up the replacement process. Further, Lifehacker.com recommends that keeping a copy of the first page of your passport in your luggage will make it easier to find your luggage if a problem pops up.
What other travel essentials do you bring on your trips?