Last time you forgot your smartphone charger when packing for a trip, did you run out and buy a brand new one? The next time that happens, try your hotel's lost and found to score one for free. Ask the front desk if any chargers have been left behind that you can borrow. They are the most commonly forgotten item at hotels, and they are also the least often reclaimed by guests. In most cases, hotels will let you keep the charger, since the window of 30 days has passed on many of them.