The audiobook industry is booming, yet only 5% of books ever get made into audio format. If you’ve got a background in acting, or if people have said you’ve got a voice made for the radio, you can make extra money recording audio versions of independent and popular books. Sites like ACX connect authors with audiobook performers. So, whether you’re an author looking for more ways to sell your book, or an actor/voice actor looking to make some extra income, you can sell your services online.
Becoming a real estate agent and earning your real estate license not only means you can work from the comfort of your living room, but you are also your own boss. Earning a license doesn’t mean you have to start as an agent; coordinators are licensed and versed in all legal matters relating to buying and selling. Coordinators work with vendors, agents, and lenders and arrange property showings and deals.
Trading options might seem risky if you have very little capital to spare. But it's also a great way to enter into a market that would otherwise cost you an arm and a leg if you were to buy the stocks at full price. With options, you can participate in the movement of a stock without having to put up all the money to actually buy that stock. For example, if Amazon costs $1000 a share, buying a 1,000 shares will cost $1 million. But, 10 call options at $10 each (with each option representing 100 shares of stock) costs $10,000. 
For a deeper look into this idea, I recommend checking out the case study in Will It Fly? on Noah Kagan, who is really detailed and transparent about starting his business. He validated a beef jerky subscription company (yum!), which proved to be a unique and inspiring example of determining the costs of items before starting a business. He didn’t pay for anything up front; he was just smart about asking: how much does this cost, and how much money do I need to reach my goal? His goal was to validate his idea by making $1,000 profit in twenty-four hours, and that’s exactly what he was able to do.
There are many ways to get people onto your list. Lead magnets are one such resource. For example, you can build ebooks, checklists and cheat sheets. But you can also do content upgrades, such as PDF versions of an article with added resources in them, four-part video training series, and more. Think about your audience and what you can offer them to better serve them, then treat them with some respect and you'll eventually reap the rewards.
Don't use jargon. If you are offering technical expertise, include descriptions that appeal to your client base, not your peers. For example, if you are showing that you can code with PHP and AJAX, don't say "in this case, if the input field is empty (str.length==0), the function clears the content of the txtHint placeholder and exits the function." The person who needs you to work on their site will just scratch their head and say "huh?" Say, instead, "Start entering text into this field, and it will auto-complete."
As the Internet continues to evolve, opportunities to earn supplementary and full-time online income will grow. The very definition of work in an information-based economy is evolving, with traditional full-time jobs disappearing in favor of different arrangements (e.g. self-employment, flexible schedules, changing skill sets, etc.). In this respect, giving it a try can open up new career and business options.
If you love kids, sign up for 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's calculator to plug in your experience and find out how much your should be making an hour as a babysitter.

Pretty self-explanatory. You can start making money playing with dogs today using Rover. Rover lets you set your prices so you can charge fair rates for your services. In addition to walking, you can also offer doggy daycare, house sitting, and boarding through Rover. If you’d rather start your own thing, check out The Balance’s How to Start a Dog Walking Business.
If you're crafty, join Etsy and set up your own shop. Sell your crocheted scarves, patterns or even blog templates you've designed. Etsy is full of a variety of products for sale. Just take a look for inspiration. However, because Etsy is full of other sellers, you'll have to work extra hard to make your store stand out from the crowd but Etsy has plenty of tools to help you monitor your traffic, put your products on sale and find new ways to increase your revenue.
How much will you make? I think my best month with Google AdSense was almost $5,000 over the last ten years. That amazing month blew my mind since it was actually near the beginning of my blogging journey. When you go from making zero to $5,000 in a month, that will rock your world. For me, it also got me even more excited because I knew there were other ways to monetize.