Ways to Earn Extra Miles

Earn miles or Paypal credits by taking surveys.
https://www.opinionplace.com/main.adp

On this site you take surveys and earn rewards. Its very easy to do. The surveys take about 15 minutes. Its free to signup. Definitely worth checking out and a easy way to earn miles. I just took a survey and earned 75 American Airlines miles. Remember to register with American Airlines on their site if you don’t have a miles frequent flyer number. You will need this number so you can collect your miles on Opinion Place. It takes a few weeks before you will see your miles posted to your miles account. You can only take 1 survey every 14 days.

http://www.e-miles.com/
This site work like Opinion Place. You earn miles for viewing various advertisements and/or answering a few questions. There are fewer question to answer so it goes quicker. You can do several short surveys in one day. You usually earn from 5 to 15 miles for each survey and are given a sign on bonus.

Here is another site worth checking out.
http://www.mileageworkshop.com/free.html