I collected cans in my teens and made a few extra bills for spending money. If this idea is of interest, you might be motivated to hear the true story of Maisie Devore who was able to raise money collecting cans for a community swimming pool. She was able to save $73,000 over three decades and is still collecting. Whoa! Learn more about this idea by reading my collecting aluminum cans for cash post.
It works in essentially the same way as the phone apps that were mentioned earlier. If you don’t mind having Google know what you do on a daily basis (anonymously), you can make money by letting them monitor your Internet usage. They use the information they gather to help them market and increase the functionality of their advertising programs when targeting users that are similar to you.
Ebates: This app offers a simple way to make money online by buying whatever you're already buying and then getting a cash-back reward. With eBates, there is no scanning receipts. Simply click a link in the app and buy it from the store. You'll automatically be credited with your cash rewards upon purchase along with receiving an email confirmation.