No need to second-guess the price you paid for your hotel. There's a new website to take care of that for you.
What it does: Forward your hotel booking confirmation email (for hotels with free cancellation) to firstname.lastname@example.org. If DreamCheaper finds the same room — or better — at a cheaper price, it will book it for you and cancel your previous, more expensive booking.
What's hot: Savings keep getting bigger if you're booking more than one room for more than a day or two. It claims to have found savings for two out of three bookings and cut rates an average of 15% and sometimes by as much as 60%. Visit the "All about the financials" section in Frequently Asked Questions if you have want more information about the payment process.
What's not: It works best when one person does the booking. For example, if someone in your party (like a spouse) doesn't know you have been using DreamCheaper and receives a cancellation email from the first hotel booked, he or she may panic and rebook a hotel room somewhere else. Things also get tricky when trying to book for points. Conditions vary, so check with your loyalty provider and the "How Does DreamCheaper Work" section in the website's FAQ.