How to flight all around the world cheap and save?

Taken from: http://www.flickr.com
Nowadays, you can travel all around the world quick, by airplane. You can get wherever you wish, from every place in the Earth. But not every flights are low-prices. Sometimes long distance trip can be really costly. Don't worry, you may select one out of many airline firm, comparing costs and get very cheap air tickets from one continent to different one. If you wish your trip to be wonderful, just fallow this couple rules, which make some decisions easier.