Stay flexible. This is an evergreen tip, but it's a good one: The more flexible you are about booking a trip, the more money you'll save.
If you can fly in and out on Wednesday, instead of Saturday, your tickets will undoubtedly be cheaper. If you're open to different locations, you can save even more, says Suzanne Rowan Kelleher, editor-in-chief of WeJustGotBack.com. "When people go to book vacations, they pick a destination and then go shopping for airfares. They think they want to go to Florida, but often they just want to go somewhere warm."
If you use a site like AirfareWatchdog.com, you can plug in your local airport and get a list of good deals. Not only will it open your eyes to locations you wouldn't have otherwise considered, but you'll save some money in the process.