Here’s a tip that’s really a two-fer:
First of all, it’s worth signing up for Travelocity Fare Watcher. You list city pairs customized to your needs and they e-mail you when the fare changes. That way you can nab the best fares for your upcoming itineraries.
Second, after you book your itinerary it’s still worth checking those emails that Travelocity sends you. That’s because if a fare drops after you have already purchased your tickets (that is, if a cheaper fare is available for your specific itinerary), you should call the airline — they will give you a credit voucher for the difference. Bet you didn’t know that, huh? 🙂