Vagabonders can be masters of packing methods, as well as knowing which items are absolutely necessary and which can be left behind. Recently, a Lifehacker article (Unusual Items Worth Packing on your Next Vacation) suggests some additional things to consider stashing in your bag before your next big trip.
Some of the items are somewhat old-hat, such as keeping a color copy of your passport in your bag, as well as duct tape. Others, like split key rings to use as locking devices, and baby powder to help get unwanted sand off your feet (see also: shower), may make you think about other uses for common items that are worth adding them to your packing list.
Do you have a tried-and-true unusual item that you always bring along? What is it, and how does it enhance your travel experience?