How many times have you made a travel reservation only to find that, if you had just known about a special promotional code, you would have gotten a nice discount?

We’d love to hear if you’ve got a special trick to find these codes. In the meantime, let me tell you one of mine- I use retailmenot.com. This website advertises that it has coupon codes for over 40,000 stores. It also has a database of codes that individuals write in to share.

I used this site when I forgot a promotional code for Amtrak a little while ago and it worked.