There are hundreds and hundreds of websites offering information and advantages for travelers. However, these were selected for their ease of use and money-saving benefits.

The best website for booking online domestic airline tickets is kayak.com. Tip: Always check two or three sites before actually booking online airline tickets. Also, right before you book on kayak.com, be sure and check the airline's website. Oftentimes they will have last minute fares that are even lower than kayak.com.

The first runner-up for low-priced domestic airline tickets is ITAsoftware.com. The disadvantage about this site is you can locate lowest fares on this site; however, all tickets must be booked by a travel agent. Tip: Make your decisions quickly. The market for airline tickets, hotels, and cars online is very volatile. Inventory can change hour to hour and sometimes even minute to minute. Oftentimes if you think about it and go back the next day, the deals will have evaporated.

The best website for booking European tickets is wegolo.com, and the best website for booking airline tickets to Asia is zugi.com.

The best website for airline reviews is airlinequality.com and seatguru.com.

The best website for hotel booking and hotel information is hotels.com. Runner-up for best website for hotels is orbitz.com. Tip: Be ready to pull the trigger because the inventory for these sites is volatile. Also, be sure and double check all the fine print before booking and also use a credit card. Also double check thoroughly everything on the reservations before you hit Enter. Oftentimes, your choices are nonrefundable and even being off by one letter or digit will give you a completely different booking than you desired.

The best site for United States rental cars is travelocity.com. Tip: Although travelocity.com has great deals on auto rentals, be sure and also check with the rental car site in addition to make they don't have any last minute lower fares.

The best sites for travel opinions and recommendations (noncommercial) are epinions.com, igougo.com, lonelyplanet.com/thorntree, tripadvisor.com, professionaltravelguide.com.

Information compiled by Condé Nast Travel (Dana Dickey Editor) and NBC News