1. Read vancouver Sun Travel section every Saturday
2. Agree about the main sites of the airlines. check it first because they always have the deals.
3.
http://www.lowfares.com/ -----> it is not a site where you can buy tickets... but the main purpose of this site is to compare the prices of the expedia, orbitz, kayak, etcetera.... SO IT IS A BIG HELP TO SAVE YOU TIME
4. if you are not picky about specific date(like losing or gaining one day or 2 days of your preferred flight dates)... I love AIRCANADA.COM and TRAVELOCITY.... trust me manh... you can always find really, really good deals... like i know that regular price for NZ right now is 2000+ but travelocity can give it to you for half of the price... jsut look at the deals...as long as you do not mind losing one day or 2 days like i said....