The British government has a very informative website for Britons preparing to move or retire abroad.
Citizenship and Immigration Canada - This is the Canadian government department that handles immigration. This website is a must read for anyone who wants to immigrate to Canada.
Statistics Canada gives loads of info on different areas, population, age, average income, etc.
The vast majority of residential properties for sale in Canada are posted on the website of the Multiple Listing Service.
Find phone numbers for people and businesses in Canada at Canada 411.
Muchmor - A free magazine about life in Canada. Addresses immigration questions too. You also can view back issues.
Meet Up - Find groups of people who have get togethers and who share interests in common with you.
Brits 2 Vancouver - This group is comprised mainly of people in Vancouver and the Lower Mainland, but has members in other parts of British Columbia as well.
Access Okanagan - Kelowna, Vernon, Penticton and other communities in British Columbia's southern interior
UK to Calgary - Calgary, Alberta
Free Mind is a really handy -- and FREE -- version of mind mapping software. It is very useful for planning.