Being a Loan Signing Agent is a great side hustle because you can make $75 to $200 per hour-long appointment working for yourself on your own schedule. Retired people, working professionals, and students can be signing agents and earn extra cash when they want. The best part is you need nothing more than a notary commission (which can often be attained by simply filling out an application)!
Mentorship. With sites like Etsy, it simply doesn’t make sense to reinvent the wheel when opening a shop. Instead, look to others who have been down the path and have learned the hard way what to do – and what not to do. Blogs like Handmadeology and EverythingEtsy.com offer hints and guidance for artists just looking to get started in this profitable home-based business.
Ratings. Whenever someone buys a book from you, they will have the opportunity to give the transaction a rating. This is when they’ll tell other potential buyers whether the book was in the condition that you described, whether it was mailed on time, and if your communications were pleasant and helpful. One bad rating can hamper sales, and a couple of them can downright stop them. Excel at customer service and your ratings will help your company grow.

However, like anything else truly worthwhile, apps require a significant investment of your time or money upfront. If you don't have the skills, then you have to hire someone who can assist you in creating a great app. But first you need to come up with an idea that will sell. Do the proper market research and analytics to come up with the right app.
Years ago, I joined Epinions and wrote reviews of products I liked. The model was simple – write a review, get paid a little for every page view and every commissionable sale the review generated. It was a fun little foray into the Internet and getting paid to write about a product seemed fun. Epinions was later acquired by eBay and shuttered in 2014.
Do you enjoy fast food or going into retail shops? Many companies hire mystery shoppers to test the customer service of their stores. A common one is Subway, which hires mystery shoppers to ensure that "Sandwich Artists" are following all the franchise guidelines. If you have time and can travel to different places, this could be a good side hustle.
Next Day Payment: When you sell on Decluttr, you receive payment within 24 hours after the sale completes and the item arrives at the new owner’s address. That’s substantially faster than many online consignment platforms, which tend to have more flexible payment terms. And it’s much more predictable than auction sites or venues for third party sellers (including Amazon), which typically allow buyers and sellers to work out their own payment arrangements.

The worst part? You will see swarms of morons who come and DEFEND this tactic! Fiverr refuses to even tell people why it holds their money for so long, yet you have idiots coming to Fiverr’s defense and making up reasons! I guess these people just have so much money falling out of their asses that they don’t NEED any new earnings in a timely manner… so yeah, Fiverr should definitely NOT be thought of as a way to make any type of quick cash.
Upwork: This website offers a great marketplace for selling just about any professional service. You don't need a merchant account, website of your own or anything else for that matter. All you need to do is be able to provide a high-quality service at a reasonable price. But be informed, you will have to compete with many others that are constantly bidding on open jobs. 
Amazon is a great way to unload used books. But, you can also sell a variety of other items on Amazon as well. You could opt to start an Amazon FBA. You could source products on Aliexpress and drop-ship them from Amazon. That gives you a near-hands-free method of running an ecommerce business without much of the hassles of personally dealing with returns and customer service.
For example, if you register for free with Textbroker.com and submit a writing sample, you’ll receive a rating based on your content quality. Then you can choose which projects you want based on your quality rating and earn 0.7 cent to 5 cents per word, or more. FreelanceWriting.com provides a long list of freelance writing opportunities culled from several top sites. Many of the recent listings offered hourly rates of $25 or more. For $21 a month, you can join Mediabistro’s freelance marketplace to post your qualifications for review by media managers seeking writers.
Become a freelancer in an area where you have expertise. If you have a skill that’s in demand, you can sell your services directly to clients who need them. Advertise your services on a personal website and look for freelancing jobs on sites like Upwork, Freelancer, and Fivrr. Additionally, hand out business cards and encourage happy clients to tell others about your work. Here are some ways you can earn money as a freelancer:[15]
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