This site will tell you how to get between any two places, anywhere. It will give you the transport options with time and $$$ for every method.
I use this site for booking my accommodation. Most of the places on this site allow you to pay when you arrive. I love the fact that most bookings can be cancelled up to 24 hours before check in. I find their reviews accurate, and like the different sort options (Price, Distance from Centre etc.) If I use the lowest to highest price option, it asks if I want to see only private rooms.
This site is full of accurate information regarding train and ferry information worldwide. I used information from here to determine where and how I would travel by train in China.
This is a budget travellers Bible. Their guidebooks are the considered the best in the business. The website is full of information. My favourite, and most used area of the website is the Thorn Tree question and answer forum. It is divided into destinations, and interests (senior, budget etc.). If I ever need information that I am unable to find, posting my questions here always gets great answers. A wonderful example of travellers helping travellers.
This is a Government of Canada website full of great information. You can find the entrance requirements for countries, vaccinations recommended etc. They also rate the safety level of each country. I do find their safety assessments to be quite conservative.
This is my go to site for booking plane tickets. I have checked and compared many other sites and this one almost always has the best fare. I always check several other sites, including the actual airline site before I book, but this site always gives me a good base price to watch.