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.
If you already have a website that's driving in targeted traffic, a great way to make passive income from the content you're already creating as an easy side business idea, is through affiliate marketing. ShareASale, Rakuten, Clickbank, and Skimlinks are a few of the best affiliate networks and tools that can help you make money from the content you already produce, thus amplifying your side business idea income. Check out this extensive list by Justine Grey, covering the 59 Best Affiliate Programs for Business Bloggers to get some inspiration on how other bloggers are growing affiliate blogs from side business idea to full-time company.
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. 
A lifestyle blogger writes about their everyday life, hobbies, and interests. From fashion, beauty tips, and male grooming, to food, restaurants, and travel, anything that you experience can be blogged about. And famous lifestyle bloggers can make big bucks. Once you have built up a following, there are many ways to make a profit. Add affiliate links to your website, promote sponsored services, create your own product range, and much more.
Similar to a YouTube vlogger, if you have a large following on Instagram then you could become an Instagram Influencer. You will be paid to promote products in your photos, from wearing certain clothes to action shots of you using particular merchandise. As your Instagram following grows, you may start out simply receiving freebies in return for a picture of you with the item in the shot. However, for those with followings running into millions, you can expect large payments to display products in your pictures. Use sites like Hype Factory to help connect you with companies prepared to pay for your influence.
Amazon will have you work on micro-projects that require some sort of human interaction. Tasks can include translating a paragraph into English (or another language), rating the search results for certain keywords, or reworking an article. The tasks are simple, and you will be paid a small amount to complete each. But if you do enough tasks quickly, you can make a respectable amount of money.
With nearly 100,000 different custom extensions both free and paid available in Google Chrome's marketplace, there's a huge opportunity for creating a useful extension for people to use while browsing the web as a low effort business idea. One of my favorite Chrome extensions, Yet Another Mail Merge, which enables you to send bulk customized emails from within Gmail, gives you 50 free credits to send emails and gives you the chance to upgrade to a paid account to unlock more sending—a great upsell for the people who are getting value from the extension. Even free Chrome extensions like SVRF Tabs by SVRF, which replaces your new tab with stunning VR and 360º images, have the potential to bring in new users and eventually drive revenue for the startup's core business. Another fun example from a friend of mine, Kathleen Garvin, is Hide images with NOPE, a Chrome extension that hides images on the web pages you're browsing—to help eliminate distractions and keep you from seeing images (like those of certain politicians) that you may want to hide. This side business idea is particularly great because it also allows you to showcase your development skills—which can be put to work as an adjacent side business idea on a freelance basis alongside the Chrome extensions you launch.
"Work from Home" is a song recorded by American girl group Fifth Harmony featuring American singer Ty Dolla Sign. The song impacted contemporary hit radio four days after its initial release on March 1, 2016 and was released as the lead single from the group's second studio album, 7/27 (2016). "Work from Home" was written by Daniel Bedingfield, Joshua Coleman, Dallas Koehlke, Jude Demorest, Tyrone Griffin, Jr., Alexander Izquierdo, and Brian Lee with production from Coleman and Dallas Koehlke. The song is primarily an R&B track that incorporates elements of trap music and tropical house beats with lyrics depicting "work" as a euphemism for sex. Many music publications included it in their lists of best songs of the year.