The Internet can be a useful tool in finding new employment. I have found the following sites to be good resources to find job openings in Canada.
Besides using the following sites to search for jobs, use the chat or discussion groups. These areas often have valuable information as well as enable you to communicate with other people who maybe in the same employment situation as yourself.
Monster.ca - Canadian only site. Searches can be done by province and city.
Careerclick.com - Listing of advertisements in select Canadian newspapers.
Job Bank - Canada - Lists jobs listed with Human Resource Centres of Canada.
Globecareers.com - Career listings by Globe and Mail.
If you are looking for jobs in the United States or internationally check out these sites.
Monster.com - International version of Monster job board.
Headhunter.net - Large International listing of jobs. Can search by country, province or city.