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. 
This next category is one of my favorites. And, it applies to almost everyone looking for a good side hustle. Why? Because it is something everyone should be doing regardless of whether they are looking for a little something to earn a few pennies during commercial breaks that requires minimal effort or they are looking to create a full-time income from home.
Several sites, such as Billboard, Rolling Stone, Entertainment Weekly and Time, ranked "Work from Home" in the top ten of their respected best pop songs of the year lists. Slant and NPR ranked the song at number eleven on its list of best singles of the year while Stereogum ranked the song at number fifteen on its year-end list with the editor praising Ty Dolla Sign's influence on the song. Aggregate news site, Inquisitr ranked the song at number two in its top 10 singles list.
For the musically gifted, offering lessons to others who want to learn an instrument can be a great source of extra income. Unless you're teaching piano, students can bring their own instruments to your home for hour-long lessons. Stock up on sheet music or songbooks in varying genres and aimed at various skill levels so you can offer a wide selection for your potential clients. Voice lessons can also bring in a lot of money if you market yourself to local high school and community theater groups.
Perhaps most importantly, though, would-be eBay moguls need to specialize. Just throwing junk online won’t work. Sellers need to know what they want to sell and how they’re going to market it to their audiences. Again, competition is fierce, so research, preparation and strategy are critical. (For reference, eBay itself provides an extensive guide to selling on the site.)
The key to success in this business is being very disciplined in buying. Limit your car buying to popular models that you can turn over quickly, models that you have a strong understanding of current local pricing on, cars that you can buy at a significant discount to the price you believe you can fairly sell them for, and cars that are highly unlikely to need major work.
Countless small businesses start out their web presence using a WordPress hosted website (myself included) before needing to upgrade to other solutions for various reasons. Many of them will pay several hundreds of dollars for someone to get their business idea set up online. If you have the patience to learn how to do it yourself, it's an extremely valuable skill and can be turned into a very lucrative side business idea—especially if you sign up for affiliate programs with companies like Kinsta, who offer high quality managed WordPress hosting plans that allow you to collect fees from the clients you refer their way. Plus, with the skills you pick up from this side business idea, you'll be able to spin up other profitable website ideas like my friend Andy's been able to do with his site, AwesomeStuffToBuy.
Work from Home Customer Escalations Rep – HotelTonight: Still recruiting. Hiring from Oregon, Washington, Texas, Florida, Wisconsin, Illinois. “We are looking for experienced call center professionals who are available to work a full-time schedule (40 hours), all shifts, including nights, weekends, and holidays… At least one year of high-volume call center experience in a metric-driven environment is required. Reliable High-Speed Internet connection. Tech-savvy and proficient with iPhone and Android…”