Sign up to become a mystery shopper. This is a great way to make money as you will have to shop at various places and take notes on your shopping experience. When you are finished, you will have to write up a report on the computer, which you will be compensated for.
If you are a good writer, there are many opportunities for you online when it comes to making extra money. For example, check out article writing sites where you can create content to be used for search engine optimization. Many pay more than a few cents per word, making it worth your while.
If you like to write, then think about Squidoo or even InfoBarrel where you can share revenue for your content. Both sites place ads on your site and split the revenue with you. You can even combine this with an affiliate program through Amazon.com to further boost your earning potential.
Many people find that they can make extra cash by completing surveys. There are many survey sites online that will pay you for your opinions. All you need is a valid email address. These sites offer checks, gift cards and PayPal payments. Be truthful when you fill out your information so you can qualify for the surveys they send you.