Hidden hotel charges can appear on a credit card statement weeks after your stay, even if you paid your balance at checkout. Generally, these phantom charges include amenities like Internet access and parking. Be sure to scan your credit card statement to be sure you were charged the correct amount -- and not charged twice.

Also, be wary If you've used a voucher for a meal at the hotel restaurant; the discount may suddenly disappear. The worst offense I've personally experienced was when the shopping spree of another guest was charged to my room.

If this happens to you, just contact the billing department at the hotel. They understand that this happens and are happy to work with you.

Have you ever made an airline reservation and been told the only available seats are those in the middle? What you probably weren't told is that airlines hold a number of prime seats for last-minute bookings to elite customers. When those seats aren't sold, they're released about 24 hours prior to departure.

To take advantage of this, visit your airline's website and look for the "check-in" link. There you will see what (newly released) seats are available, and you can change yours if necessary.

If that doesn't work, use the check-in kiosk when you get to the airport. It offers the same option.