Even if you think you can't afford a vacation, there are some great websites to help you score travel deals.
AirFareWatchdog.com
If you have a dream destination, plug it into airfarewatchdog.com and you will receive email alerts when low fares pop up.
BeFrugal.com
Going by air may not always be the cheapest way to go. BeFrugal.com computes the estimated cost and the cheapest way to get from point A to point B.
Flash Sale sites
Check out flash sale sites like Jetsetter, Tablet Hotels and Vacationist, which offer up to 70% off fabulous vacations.
Monitor pricing
Finally, monitor pricing. Once you've booked your trip register your tickets with Yatpa. If there's a significant drop in price you may be eligible for an airline refund.
Tingo offers the same services for hotels.