I just got my travelocity email and they are now offering a fare watcher program where you can choose up to 10 destinations that you would love to go to, or plan to go to, and they will notify you with price changes and special offers. I wish I had signed up for this before I booked my Cayman Islands trip. I could have watched the prices over time and had something to compare my actual fare to. 

http://community.active.com/blogs-create-post!default.jspa?blogID=2674

1) Book now...just sit down, figure out what you want to do and book the flight before the fares spike. Kayak.com  has weekly and daily fare alerts. Sign up by plugging in where you want to go and how much you want to pay and they will email you when the fare meets (or beats) your target price.

2) On Kayak.com  you can also check the airfare history by clicking on "chart" view after searching for a fare. In some cases it may be much cheaper to fly over New Years weekend than over Christmas.

3) Check alternative airports! It might be a little further away but well worth the savings.

4) If you book your holiday ticket through Delta, sign up for the '[tickets for life|https://www.delta.com/marketing/ticketsforlife/index.jsp?Log=1&cid=2423502&MkCpgn=DA_DL_CRM_TFL_Q407] ' sweepstakes first for a chance to win 2.5 million miles, then book your flight.