If you live near a university, there are likely all sorts of research studies looking for participants. While I was an undergrad at Virginia Tech, I got paid $500 to participate in a 6-week dietary study. The study provided all my meals and paid me, but I had to eat a 5,000 calorie diet of 50% fat for 6 weeks, plus I had multiple muscle biopsies, urine/blood testing, etc.
Take the hobby you love and do it for money...from home. The number of possible types of crafts you could make is endless--knitting, jewelry, scrapbook, pottery, ornaments, textiles and so on. To make this work, though, you have to not only create a quality product but you need to know how to market it. You can go the old-fashioned route and take your wares to craft shows and flea markets or use the Internet to expand your options. With online options like Etsy and eBay, your potential market is worldwide, but so is your competition. 
If you have a vehicle that just sits in your garage for long stretches of time, you might find a car rental service like Turo is one of the easiest ways to make extra money. Let’s say you list your 2014 Nissan Maxima in Denver, CO. If you rent out your car for just 11 days a month, Turo says you could make around $385. That’s over $4,600 a year!(6)
Are you an animal lover at heart? How about making some extra money just by taking a dog for a walk or boarding a cat for the weekend? You can advertise your own pet-sitting business on social media, put up signs throughout your neighborhood, or use a website like Rover. They let you set your schedule and adjust your fees as you see fit. If you do use Rover, keep in mind that they take a cut of what you make.(3)
You have likely heard of subscription boxes such as Birchbox and Julep. While almost anyone can start a subscription box service, they can be incredibly labor-intensive and the profit margin usually isn’t so great for those operating on a small scale. Did you know you could start a subscription for your knowledge that’s almost pure profit? With sites like SubHub, you can offer a monthly membership offering anything from meal plans to workout plans to crocheting patterns and beyond. The sky is the limit. You do need to provide new content on a consistent schedule to keep your customers happy. But if there is something your friends are always looking to you for new ideas, you may have an easy little side business on your hands.
White labeling products involve purchasing pre-made products from a supplier and then adding your own labeling and branding. Products could range from candles to gym equipment or even tea, but all will come without labels, allowing you to create your own new range of merchandise. Most suppliers will advertise the fact they offer white labeled goods on their websites, so pick your niche and then find the right supplier and product for you. Once labeled, products can be sold via sites like eBay and Amazon, or from your own eCommerce store (discussed in a moment).
Selling digital products can be just as successful as selling physical products. Graphics, software, eBooks, design elements, sound effects, songs, and videos are just a few types of digital products that are in popular demand. So if you can turn your hand to creating digital products, let’s have a look at how you can make money online from this skill…
Take advantage of the growing delivery trend and sign up for a service like Instacart, UberEats, Postmates or Amazon Flex. You get paid per delivery, in most cases, and can even earn tips. A car isn’t always required — Postmates lets you use a bike, scooter or your own two feet to make deliveries — but a background check almost always is part of the deal. Learn more about how to get started with Amazon Flex, UberEats and Instacart.
In an increasingly visual internet, website owners, bloggers, epublishers, video makers, and others need quality photos for their content. However, you don’t need to be a professional photographer to make money from your pictures. Quality photos from your smartphone are often good enough to sell online. Most stockphoto sites pay 15 to 60 percent of the sale of your photo, usually through PayPal.

Watch out for inflation chipping away at your assets. We've all heard an elderly person describe the purchasing power of a coin in their day. Inflation continues to make today's money worth less in the future. To win the race against time and inflation, learn to invest your money in the right places. A savings account might help you to keep up with inflation; however, to stay ahead of the game you'll want to invest in bonds, stocks, or some other investment that returns above the average rate of inflation (currently 3%-4%).

You have likely heard of subscription boxes such as Birchbox and Julep. While almost anyone can start a subscription box service, they can be incredibly labor-intensive and the profit margin usually isn’t so great for those operating on a small scale. Did you know you could start a subscription for your knowledge that’s almost pure profit? With sites like SubHub, you can offer a monthly membership offering anything from meal plans to workout plans to crocheting patterns and beyond. The sky is the limit. You do need to provide new content on a consistent schedule to keep your customers happy. But if there is something your friends are always looking to you for new ideas, you may have an easy little side business on your hands.
As far as the work itself, there’s a good chance you’ll need a virtual private network (VPN) to safely connect to your company’s system, as well as some measure of organizational skills (tip: you can use organizational tools, like Trello) to make sure you’re on top of current projects. The payoff for full-time computer programmers is lucrative, and the average annual salary is over $60,000 according to Payscale.com.

If you can do everything, then you can become a one-man film crew who allows a company to cut costs while still enjoying video advertisement revenue. That makes you powerful asset, because it allows the company to reduce risks and can help keep you employed full-time. So, if you’re already a pro at setting up a shot, make sure you also have mastered the software you need. If you’re a wiz on the computer, try doing some Facebook Lives, interviews and other sorts of videos to make sure you’re prepared for anything.

Along the same lines as trivia, you can get paid for just using your mobile phone and allowing companies to know what you're doing on it. For example, Nielson Mobile Panel is an app that you can earn rewards on just for having it installed. It will take snapshots of what you're doing and use those for advertisers to know more about your demographic. It takes away some privacy, but you get paid for it.
Fiverr is one of the biggest providers in the gig economy on the web and you can sell a wide variety of services and products through this medium. Do the research and find out what you can offer. However, keep in mind that like any other money-making task, it takes time to succeed here. And stellar reviews will help you generate more and more income over time.

Cafe Press: This website allows you to create digital designs that can then be sold on the platform. You'll earn a commission for everything that sells and you'll never have to deal with logistics like printing, warehousing and customer service. If you have some graphic design skills, then this is a great potential source for your web-based income. 
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