Whether it’s an important consumer application, a specialist app to solve a particular niche problem, or even a time-wasting game you can play on your phone, you can create a massively successful business if you build software that helps people. (Look at the rise of Slack—the team communication software that went from side project to billion-dollar company in just 2 years.)
As of 2012, estimates suggest that over fifty million U.S. workers (about 40% of the working population) could work from home at least part of the time, but in 2008 only 2.5 million employees, excluding the self-employed, considered their home to be their primary place of business. The number of employees reported to have worked from their home "on their primary job" in 2010 has been reported as 9.4 million (6.6% of the workforce), though, this number might include the self-employed. As of 2017, roughly 3.7 million employees—2.8% of the workforce—work from home at least half the time, Global Analytics Workplace reports. Very few companies employ large numbers of home-based full-time staff. The call center industry is one notable exception: several U.S. call centers employ thousands of home-based workers. For many employees, the option to work from home is available as an employee benefit but most participants only do so a fraction of the time. Top paid among work-from-home sectors are home-based physicians and radiologists in which it is suspected that they earn near the $1,975 median weekly income of physicians, as reported by the U.S. Bureau of Labor Statistics, making it a six-figure job. Studies show that at-home workers are willing to earn up to 30% less and experience heightened productivity. 
Normally you’ll be asked to test a few websites by visiting them and to document and record your reactions and thoughts as you go through it. It’s really easy to get set up making extra money online by testing websites. All you need to do is sign up to the following services: UserTesting.com, Userlytics, TryMyUI, Userfeel, TestingTime (UK only), or Side Income Jobs.
There are quite literally hundreds of clever ways to make money online. From taking online surveys, to renting or selling your old clothes, flipping your iPhone to someone in a different country, and even buying low-cost products locally, just to resell them for a higher price on Amazon. There’s truly no shortage of unique ways to make money online.
Here’s a good example of how lead sales can work in real life: My second website, Life Insurance by Jeff, brings in a ton of traffic from people who are searching the web to find answers to life insurance questions. While I used to have the website set up so I could sell these people life insurance myself, it was a lot of work to process all the different requests and clients. As a result, I started selling the leads I gathered instead.
Take good pictures. Some of the options below don’t require you to actually take the picture and sell the product, but for the ones that do, make sure you take a clear picture that makes your product stand out from the others. If you’re going to be taking a lot of pictures, set up a small “studio-like” area in your home with a backdrop and proper lighting to really make your pictures come across as professional. And of course, you’ll want a good camera too.
When creating a membership site, always offer different plans and pricing tiers to appeal to your different categories of audience. Access to specific types of content is then dependent on the plan selected by a member. Membership fees can be a one-off payment or a repeat subscription. And you can even sell products on your membership site to boost your income.
If you are a professional photographer or have a real flair for photography, then selling your images on other sites could be an idea. This could be done alongside your own photography site, as it is a good way to help get your work viewed by a wider audience. There are numerous stock image websites to contribute to, but choosing a popular high-end site like Shutterstock should ensure your photographs make you some money.
Creating a jobs board website can be another profitable venture. The ‘jobs’ field can be quite saturated, so it is important to find a niche that is still crying out for a jobs board website. Monetize this type of site by charging businesses to list their jobs on your site. Those searching for jobs could also be charged a fee to access the higher paying job adverts.
In the 1990s, telecommuting became the subject of pop culture attention. In 1995, the motto that "work is something you do, not something you travel to" was coined. Variations of this motto include: "Work is something we DO, not a place that we GO" and "Work is what we do, not where we are." Telecommuting has been adopted by a range of businesses, governments and not-for-profit organizations. Organizations may use telecommuting to reduce costs (telecommuting employees do not require an office or cubicle, a space which has to be rented or purchased, provided with lighting and climate control, etc.). Some organizations adopt telecommuting to improve workers' quality of life, as teleworking typically reduces commuting time and time stuck in traffic jams. As well, teleworking may make it easier for workers to balance their work responsibilities with family roles (e.g., caring for children or elderly parents). Some organizations adopt teleworking for environmental reasons, as telework can reduce congestion and air pollution, as it can reduce the number of cars on the roads.
Work in grocery delivery. Instacart is a company that will pay you to pick up grocery store orders in your spare time. The entire purchase and order takes place through the Instacart app, making it easy for you to pick up the groceries your customers wants and get paid. Like other food delivery jobs on this list, Instacart lets you earn a per-trip rate plus tips. Shipt is another service that will pay you to shop for groceries and deliver them to consumers in your area, so make sure to see if they’re available where you live.
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.