If you're unfamiliar with the concept of arbitrage, here's how it works. Wikipedia describes an arbitrage as effectively, "the practice of taking advantage of a price difference between two or more markets: striking a combination of matching deals that capitalize upon the imbalance, the profit being the difference between the market prices." Clothier was able to identify arbitrage opportunities in the grocery industry with precision. 
OneOpinion— signing up is completely free, as it should be. This survey site, like many others, works on a points system: 1,000 points = $1. Once you reach 25,000 ($25), you can choose to cash out via PayPal or an Amazon gift card. OneOpinion also offers product testing, which means you have the opportunity to test new products at home before they hit the market.
Open an Etsy store. If you have a creative talent or skill – whether it’s creating art, sewing clothes, or making keepsakes – you can open an online store on Etsy.com and sell your wares for some quick cash. With your own Etsy store, you’re left in charge of pricing and, ultimately, how much you make. See our detailed primer, “How to Make Money on Etsy.”
If you want to help shape products in their early stages, joining an online focus group or answering survey questions is a great way to make extra money online. They don’t pay as much as some of the other options we’ve highlighted, but you can join groups on sites like Survey Junkie, Swagbucks, and IPSOS that pay out through Amazon gift cards, check, or PayPal. You’ll be asked to provide a bit of information about your demographics (age, location, etc…), but after that you can get going making money through surveys.
In his first 18 months after that real estate infomercial and learning the arbitrage strategy, he did 91 wholesale deals and made a million dollars. He didn't need to use any of his cash to do it. He simply replicated the same technique he utilized in the grocery industry, but instead, did it for the real estate industry. And the results were unfathomable, allowing him to generate millions of dollars, almost on demand, while also becoming one of the leading internet marketers in the world, building up a massive list.

Turn your photographs into cash via sites like Fine Art America, which lets you upload your images to sell as prints, t-shirts, phone cases and more. Other marketplaces for photographers include SmugMug, 500px and PhotoShelter. Some sites require a subscription but may provide features ranging from cloud storage to password-protected galleries and a customized website. 
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