Lonely Planet - www.lonelyplanet.com
Like you don't know this one! Still, if you had forgotten it, this is THE website to go for quick facts and stats about where you are travelling to next. And, of course, there is the Thorn Tree forum, where you can ask anything, from whether you can suffer from hayfever in India to whether anyone will be in Singapore for Christmas...
Nomad Travel - www.nomadtravel.co.uk
There are some things you know you need when you go backpacking - mosquito nets, sleeping bags and, of course, backpacks. However, did you know that you might need a no-peg washline, a lock to keep the door closed even if someone has a key, or some travel wash that not only washes your hair but also your body and clothes...and your food? Well, Nomad Travel has it all (and more) for the intrepid traveller. It is hard not to spend money here.
Subway Navigator - www.subwaynavigator.com
This one is ALWAYS handy. Need to know how to get to your hostel in Tashkent, Santiago or Volgograd? Then look no further than Subway Navigator! You can look up how to get from A to B on underground networks all over the world - just enter your departure and arrival stations and Subway Navigator will tell you where to change lines and how long it will take. Need it put even more simply? Then you can 'visualise your route' with little flashing lights showing you your path. Just great!
YouTube travel section - http://www.youtube.com/categories_portal?c=19&e=1
If you are in a part of the world with a SLOW internet connection then the above site is not for you. But if your connection is okay then check the YouTube travel section to see what is going on around the world. Not sure where to go in a city? Then see what other people have filmed of it. Not sure what a Yoyogi show is? Then check it out. Also, if you are a posh backpacker with a camera, you can upload your own videos so your family and friends can see how you are getting on. What did we do before the internet?