If you are going to cruise during busy seasons, then book early. The prices can only go up.

We have had significant price drops in the past, because we sailed during off-peak season. E.g. sailing in the Med during Nov/Dec, you can get some good deals.

But over time, we found it more difficult to get deals. Why? The cruise lines move their ships to where the demand is!

A real example - the price kept dropping for a cruise on Celebrity Silhouette we took a few years ago - http://guitar123foodandtravel.blogsp...-adriatic.html

Thankfully we had a good travel agent who helped us get lower prices along the way, and even after final payment, she still managed to wrangle some perks out of the cruise line.

When we got on board, many passengers (most American) whom I spoke to told me that they never planned to come on this cruise, but the last minute deals were so compelling they decided to do it.

The next year, Celebrity moved the same ship to the Caribbean way earlier.