Planning a business trip is a hassle, particularly when it involves numerous cities, airports, hotels and meetings. TripIt Travel Organizer is handy way to keep your itinerary in order. Here's how it works: When you get a confirmation email from, say, an airline or hotel, you forward it to TripIt, which creates a "master itinerary" that you can view from any PC or mobile device. In addition to organizing trip details, TripIt pulls in helpful information, such as weather forecasts and maps of your destination. TripIt Pro ($49 per year) also alerts you if your flight is delayed, cancelled or has changed gates. It also finds alternative flights, and lets you input all of your frequent flyer info. If you travel often, check out TripIt.