college tuition when she goes back to school to get her Masters in Social Work. 9. Be a secret shopper Keen eyes for detail as well as a good memory are really all that it takes to succeed as a secret shopper, says Zippy Sandler, who has been mystery shopping for about 13 years. After registering with a secret shopping company, you are paid to basically go undercover and report on a company's operation from the customer point of view. Sandler decided to start secret shopping not only to earn money eating, traveling and shopping, but also to learn customer service skills to pass along to the employees she managed at a retail store. Depending on the clients she is shopping for, Sandler says she has earned everywhere from $100 to $2,000 per month. 10. Sell your photos to stock agencies It does n't matter if you 're a hobbyist, an amateur or a seasoned photographer - anyone can submit their photos to stock photo agencies like Shutterstock.com. If your images are accepted, they will be available for download by subscribers. Each time someone downloads your photos, you get 25 cents. Copyright CareerBuilder.com 2009. All rights reserved. The information contained in this article may not be published, broadcast or otherwise distributed without the prior written authority