If you are planning an airline trip, offer to get "bumped." Getting "bumped" means that you will offer your seat to another passenger in exchange for a voucher for a free flight for your next travel. Many airlines will overbook flights, so this option is definitely a possibility. You can use your free voucher for another vacation.
If you are traveling with small children or multiple people, this may not be a good option for you. Also, if you are limited on time at your destination, you may not be able to get bumped.
