Mechanical Turk: Amazon's Mechanical Turk is a resource for doing human-intelligence tasks, or as the site commonly refers to them, HITs. You get paid a very small fee for any given HIT and you'll need a good deal of volume to make a substantial amount of money. But it is a resource you can use in your spare time to generate a small income online. 
– Project Payday is one of those sites that has testimonials of people who have earned thousands of dollars by getting paid to get trial offers. I’m not saying you’ll earn thousands, but it is legit and you can earn some extra cash. They assume that by paying you to do a free trial, you’ll either like the product and purchase it, or forget to cancel the trial and get charged for it. If you can keep track and cancel before you get charged (if you don’t want the product), then this is a great site for making some money.
Expertise is another matter, but remember that writing can take many forms—from resumes to news articles to marketing materials and even thank-you notes. (You can even write for businesstown.com, although that gig doesn’t pay … yet.) There’s probably some form of writing you’re qualified to do. Plus, if you’re good enough with grammar and punctuation, companies will pay you to be a freelance editor. One friend made good money editing posts on a popular travel site.
Like starting a home bakery, developing a catering service comes with a unique set of food-oriented challenges. Right off the bat, you need to make sure that it’s legal in your state or municipality to use your home kitchen for commercial food production. If it is, you’ll still need to make sure that you’re following food-safety regulations and other relevant laws.
Learn then selling guidelines. Each marketplace has guidelines that define what you can and cannot sell. State and federal laws also impact what items are prohibited. In general, you cannot sell alcohol, weapons, service contracts, animals or event tickets. Also, while not always prohibited, you may find restrictions on how you can sell items in some categories, such as art, gift cards and coupons.[27] eBay, Craigslist and Amazon publish these guidelines on their websites.
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