DVCMember.com has an extensive list of advice for those looking to book. Please be sure to check it out and heed the advice.
Since it bears repeating, here are a couple of important tips. If you want to have a choice of any stateroom category, you must call on the first booking day--preferrably as early as possible. Each category has a limited supply of rooms and when they're gone...they are gone. Also be prepared for long wait times on the phone. Booking a cruise takes much longer than a normal DVC reservation and even with a full compliment of agents working, callers may have to wait several hours to make their reservation.
If you book the cruise this year, don't forget to stop by the forum and tell us about your experience!