Planning out a vacation, especially abroad, requires current information on everything from costs to tourist-friendly locales. If you're basing your travel plans on a source that's thorough, but 15 years old, you might find yourself sorely disappointed.
If you're not sure where you want to jet this year, and want a resource that offers extensive information on the best places to be, see and experience, I recommend taking a look at Lonely Planet's Best in Travel 2012. The guide is a great overview of all the hot destinations this year, and takes into account current prices, upcoming events and other pertinent info and lays it out for you to have a good sense of what's available and where you want to visit this year.
Once you whittle down where you want to go, then you can tune in on the fine details with your travel planner and other available resources. But, in the beginning of the planning process, having a broad but current view of what's happening around the world will save you frustration, time and quite possibly from a bad trip.