The key to having a good vacation is not always that it is well planned. However, getting a good deal where ever you go makes for just that much extra cash to just a few extra things. I also have just started taking vacations by finding the best deal and going there. Just recently we had a great deal from Monterrey to Vegas but ended up taking a week in Cancun instead with three days on a 45′ motor yacht (photos here).
Here are the sites that I use or have been advised to use by people who really know like Clark Howard.
Travel out of USA
For booking hotels in USA try one of these three:
Travel out of Mexico
Trains out of Belarus