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.
You'll also need ecommerce software, fulfillment software, worry about warehousing, customer service, refunds and so on. But that's not all. You'll also need traffic. Think search engine optimization, Facebook ads, and other social media campaigns. Sound like a lot of work? Sure, it is. Especially if you do it all on your own. You could opt for Amazon's platform, which might be the easier route. But, then again, at the end of the day, this is a serious business, which could produce significant profits. So you're either all in or you're not.
If I have a blog that is getting 100,000 page views a month that means that I’m probably getting at least 50,000 people to the site (most blogs will do between 1.2 to 1.4 pages per session). That means I have to try and get some small percentage of those people to buy something from me if I really want to do well. If I can’t get them to buy something then (in some cases) I have ads running on the site that will make me money anyways.
Please note that some of the links below are affiliate links and at no additional cost to you, I will earn a commission. Know that I only recommend products, tools and learning resources I've personally used and believe are genuinely helpful, not because of the small commissions I make if you decide to purchase them. Most of all, I would never advocate for buying something that you can't afford or that you're not yet ready to implement.
Those lucky enough to speak more than one language have the option of becoming translators. Many companies hire work-from-home representatives to answer customer or client calls in another language. Besides verbal translation, fluent readers are needed to translate documentation, another job that can done at home. Being able to fluently speak two or more languages is the main skill set. As a bilinguist, you have double the chances of finding your dream work-from-home job; search for your gig using keywords in both languages.
Most people think that you need to have a lot money stocked away before getting started with investing in real estate, but that isn’t true. In fact, you can start with with as little as $500 by using a platform like Fundrise. Fundrise allows investors of all types (beginners and experts alike) to invest directly in a real estate portfolio that’s managed by a team of professionals.
Or, if you’d prefer more something more editorial and less salesy, you can find that, too. Media companies (including Entrepreneur) offer digital writing and editing positions for the digital publication, which essentially can be accomplished from anywhere in the world -- as long as you have an internet connection. In fact, we have some writers at Entrepreneur who work from Paris or their home offices instead of the office in New York City.
Need help deciding which business structure is right for you? Try our handy business structure comparison chart. LegalZoom’s business formation services include filing your paperwork with the state, obtaining your EIN from the IRS, and connecting you with independent lawyers and tax professionals through our business legal plan to answer any questions you might have.
What, specifically, can you sell on Fiverr? Anything from graphics and design services, to digital marketing, writing and translation services, video and animation services, music and audio, programming and application development, business services and lifestyle services that includes anything from celebrity impressions, to gaming and even astrology readings.
Ratings. Whenever someone buys a book from you, they will have the opportunity to give the transaction a rating. This is when they’ll tell other potential buyers whether the book was in the condition that you described, whether it was mailed on time, and if your communications were pleasant and helpful. One bad rating can hamper sales, and a couple of them can downright stop them. Excel at customer service and your ratings will help your company grow.
If you’ve got experience and expertise in a specific area of business, there are hundreds if not thousands of business owners who would love to jump on a phone call and pick your brain. This can be an easy way to make extra money online and to hone your skills to use in your consulting or freelance business. Sites like Clarity.fm let you create a profile where entrepreneurs and business owners can pre-pay to book a phone call with you for a set amount of time. Whether you’re an expert in raising money for startups, building apps, or running a restaurant, you can make extra money selling a few minutes of your time to people in need.
Find a profitable niche. Starting with your interests, write down as many niche ideas as you can. Think about topics people might search online. Ideas include passions (like surfing or body building), fears (like spiders or speaking in front of crowds) and problems (like getting out of debt). Do keyword research to see it others are interested in the topic. Find out if a domain name is available that matches the keyword 100 percent. 
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 printing, warehousing, customer service and so on. The site has over 2 million independent designers that have created products being sold online here. If you have some graphic design skills, then this is a great potential source for your web-based income.
Through this experience, one thing I learned is that development, and the selling of the product you develop, takes time and money. This is a lesson I took to heart when I built another software company, SPI Labs, with my partner Matt Gartland. SPI Labs is behind the Smart Podcast Player, which was a significant undertaking that started out as a custom solution for AskPat and eventually became a successful WordPress plugin used by thousands of fellow podcasters.
FlexJobs is 100% legit. While it may not be necessary for everyone, if you have limited time available to dig around on the internet and vet companies for legitimacy it’s well worth the investment. They research each job lead to make sure it is truly remote or flexible and it isn’t a scam. I’ve had a membership for a very long time and find it well worth the small investment.
One of the cool things about Google AdSense is that it's so easy to get set up. If you have a blog or website, you can sign up for a free Google AdSense Account. From there, Google will give you a unique code that you will paste onto your website. Google takes it from there, tracking your page views, traffic, and earnings on your behalf. There is no upkeep or maintenance to get this thing going, which makes it a no-brainer if you have a website already.