5. Buy stuff for your company or your friends
Are you in a job where you plan meetings, buy office supplies, or expense the team lunch? Turn those tasks into free travel by putting them on your credit card, earning rewards, and then paying them off when your employer reimburses you. Or, just be that dude who collects cash from his friends and pays the bill with his miles-earning credit card, even though he claims it's just because he didn't have time to hit the ATM.
6. Buy points and miles Ok, while not technically free, you can fly in business class for a fraction of the price of economy when you find an airline that's selling miles at a discount. US Airways does this a lot. As does South American carrier Avianca/TACA, which lets you book award travel on United and many other Star Alliance partners. During one recent promotion, you could buy their miles for 1.5 cents each; meaning a business-class ticket to Europe worked out to around $1,575, or about a quarter of the regular cost.
IHG hotels is currently selling points for about .58 cents each, enabling you to stay at a luxury property for less than half price. And every spring, American Express and the US Travel Association sell points and miles on the cheap with their Daily Getaways promotion.