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.

Have you ever heard of Uber or Lyft? Of course, you have! This is a great earning opportunity for someone with a reliable car and the ability to navigate their city’s streets. The main barrier to entry is having an approved car that is efficient to keep your costs down. There are lots of stories of Uber drivers making an extra $1k a week outside of their normal day jobs! Not bad. Plus, this is a fun way to get to know your city, help tourists make plans, and get to know interesting people. Lyft is offering $300 Sign-up Bonus! Or if you prefer Uber, click here to drive with Uber. (Or do both!)
If you offer freelance services or have a physical services business, then creating a blog is a must. On your blog, you can write about the services you offer and how they will benefit your clients. Importantly you can add a ‘Services’ page, outlining the services you provide, what they include, and any other important information potential clients may need. This is an effective way to promote your services, generate leads, and increase your revenue.
Advertising. You’ll need to get the word out about your sewing business, and one of the best places to start is with your friends and neighbors. Make sure they are all aware of your services and are willing to pass around your business cards. In addition, you should put up fliers in local fabric stores and get to know the employees so that if someone asks, they’ll be able to refer you. Any business needs a website, and yours will be no exception; you can put up a simple one that outlines what you do, and tells the reader what kinds of prices to expect. Finally, by joining organizations like the American Sewing Guild, you’ll be able to stay in touch with others who are doing the same thing as you.

Jobs are available mostly on a full-time basis. Current positions available include sales, advertising, account management, project/program/product management fulfillment and operations management, human resources, business and merchant development, operations, IT and support engineering, facilities, maintenance and real estate, and customer service.
You want to know the truth about the side hustle? You will be extremely successful with affiliate marketing and blogging. Blogging is a beautiful content marketing labor of love. The Pro to it is you’ll make all the money you want. The con to it is it’s a pretty lonely life. So you give up something in exchange for something else. Would you rather go to a cushy day job with a salary cap of working for a narcissist employer and be denied a raise after asking and keep working for them? Or work for yourself and become a millionaire and live a lonely life? Something to truly think about.
If you're ready to enter the ecommerce fray, you could sell your own stuff. Of course, along with selling your own stuff on your own website comes a whole slew of both responsibilities and technical configuration and requirements. For starters, you'll need a website and a hosting account. You'll also need a merchant account like ones offered by Stripe or PayPal. Then you'll need to design that site, build a sales funnel, create a lead magnet and do some email marketing.
If you love kids, sign up for Care.com or SitterCity to spend a few hours a week babysitting. These websites verify both babysitters and those seeking sitters with background checks, so you can ensure you're conversing with a reliable source. Babysitting rates vary based on years of experience, number of children, and hours per week. According to ZipRecruiter, the average hourly rate for a babysitter is $28. Use Care.com's calculator to plug in your experience and find out how much your should be making an hour as a babysitter.
People love to spend weekends rummaging through tables full of other people's unwanted items, looking for treasures. Make sure to change your layout and put new stuff out for sale often. You want people to come back time and again to see what's new. You don't even have to have that much new stuff to make things look new. Just moving an item from a table to the top of a bookshelf might get it noticed, even though the item has been in your inventory since you first started having sales.

I have a personal blog that I use for journaling. I became good enough that I opened my own business as a social media consultant. I’m now making a decent amount of extra money. I am also a photographer with a lot of graphics program experience, so I make a little more by doing graphic design, photography, and even digital enhancement. You don’t have to be the best at something in order for it to be profitable; you just have to put in the work and be better or cheaper than other people out there. However, it IS 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.
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 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.

Not to be confused with hoarding, this business idea takes a lot of time, patience, and passion. If you have an eye for good art, it’s easy to get in on the ground level by visiting the studio department at your local university—though don't expect to get rich overnight with this side business idea. Many art students are more than happy to sell their work for a bargain, and in as little as a few years, there's a chance that piece you bought for a couple hundred bucks may be worth well into the thousands. Beware though, this business idea will take a whole lot of patience (and storage space for all that art).

Software drives businesses today. This is a fact not lost on individuals and companies attempting to earn a profit, make a name for themselves, or simply get things done. As a result, the job outlook for software developers will be much sunnier than prospects for many other occupations—creating massive opportunities for this business idea well into  the future. In fact, it won’t take you long to find a good-paying software development project as a side business idea on sites like Upwork, Guru.com, and Freelancer. LinkedIn also recently launched their brand new freelancing platform, ProFinder which has a dedicated section just for hiring talented software developers.
Mechanical Turk: Amazon's Mechanical Turk is a resource for doing human-intelligence tasks, or as the site commonly refers to them, HITs. You get paid a very small fee for any given HIT and you'll need a good deal of volume to make a substantial amount of money. But it is a resource you can use in your spare time to generate a small income online. 
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