Look at Ads for Miles

Earn various airline frequent flyer miles through looking at ads with e-Miles. You can request how often you receive emails from them so you don't have to worry about your inbox overloading with emails. Basically, there will be ads you click on and read. You will get about 5 miles per ad, and if you purchase or donate to the organization from the ad, you can get more miles. I usually just look at the ads because it's quick and free, and I slowly accumulate miles. Sign-up here!