The Learning Annex (212-371-0280, learningannex.com) offers more than 8,000 courses each year, from how to be a matchmaker and how to flip houses to how to be a "Real Cougar Woman." If you have an idea for a class ("How to Make Money Without Really Working"?), send an e-mail to newcourse@learningannex.com. For noncelebrity teachers, they pay a percentage of the revenue. The average class costs $44.95—so enroll 30 students and you'll make $150--$200.

You won’t be able to sell the card for its face value, but you may get as much as 90% of that value. Start your resale process at GiftCardGranny.com, a comparison site. It will give you a good sense of how much your card will be worth. When you sell the card, the site will generally cover the cost of shipping the card to them, and you will receive your payment within three to seven days.
If you make a mean mojito, invest in a shaker and start mixing for private cocktail and dinner parties—it's the only time someone will ever pay you to get them drunk. Certification isn't required in New York, but it will make you more legit if you're advertising on Craigslist. For help with that, hit the New York Bartending School (212-768-8460, newyorkbartendingschool.com), which offers a 40-hour, $695 course that ends with state certification and job-placement assistance.
Many people fancy themselves as designers. If you have a unique idea for a new product then it may be time to get it designed. This can be a long process involving prototypes, discussions with factories, package design, and much more. However, the profits once the product is on the market could be substantial. And remember, with Amazon FBA, your products can all be stored and shipped by Amazon, giving you time to think up your next invention. Learn more about Amazon FBA with my How To Start An Amazon FBA Business Guide.
If you actually enjoy putting together Ikea furniture or standing in long lines, you may be cut out for doing tasks for others. Websites like TaskRabbit can connect you with people who need help with a variety of things. Moving, cleaning, delivery and being a handyman have the “highest earning potential,” according to the company. Read about how to get started on TaskRabbit.
Start a small business. Being passionate usually translates to a superior product and better service, which is especially sought after in the age of the anonymous, 1-minute online review. Worried that there isn’t a market for your interests? The fact is that though you may not personally know many people who want what you have to offer, thanks to the internet, there’s a huge market for niche-products (pigeon diapers, chainmail wedding dresses, you name it)… and you might just end up being a trend-setter. To create an online store, you can either make your own website or, if don’t want to self-host, you can sell on eBay or a similar site.
Become a moving advertisement. “Wrap” your car in an advertisement, go about your usual commute, and get paid monthly to do it. (Some car-wrappers in San Francisco make as much as $400 a month doing this,[1] but of course this varies depending on how big a city you live in and when / how often you make your commute.) You can also get paid to wear a company’s logo t-shirt around (particularly if you wear it someplace conspicuous, like at your school; see ShirtsInSchools.com as one example).
Robo-advisors are diversified investment accounts that are automatically managed by a computer algorithm (as opposed to a human money manager). If you want to invest, but don’t have the money, or don’t want to invest with a money manager, robo-advisors are for you! Robo-advisors make investing easier—and cheaper—so they’re perfect for new investors.

I recently stumbled on the Trim app and I have to say, this one is a game changer. It’s a simple app that acts as your own personal financial manager. Once you link your bank to the app, Trim analyzes your spending, finds subscriptions you need to cancel, negotiates your Comcast bill, finds you better car insurance, and more. And of course, the app is free! My bet is that it will only take a few days for Trim to put an extra $100 in your pocket. So easy!
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