Take surveys. You can earn $50 to $100 per month in cash and products by taking online surveys. Find survey sites by searching for “paid survey sites” online. Sign up for several survey sites to increase your chances of being selected for higher-paying surveys. Register with an email address, and check your email often so you can respond quickly to survey offers.
If you're looking to address some immediate financial needs, then the app economy is likely right for you. Thanks to the global sharing phenomenon, launched in part by our smartphones and ever-burgeoning global connectivity, you could easily opt for some quick active income by using well-known apps. From ride sharing to deliveries and even quick tasks, there's an app for that today, as the saying goes. 
That said, lot's of people are making extra money by publishing their own books on Amazon.  For instance, my friend Bob published a few books on Amazon on how to make money blogging and has done very well.  The first book provided basic tips for a small price, but his next book, Pro-Blogging Secrets, is offered at a premium price and he also has an online course.

If it’s not clear yet, information and expertise are two of the most consistent and lucrative ways to make extra money online. If you don’t like talking on the phone, you can sign up to get paid to answer professional questions on JustAnswer. There are thousands of questions being asked every month from people looking for help from lawyers, doctors, mechanics, vets, and more. To apply, you’ll need to supply your professional verification, resume, and a form of identification.
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Use your blog to share hobbies, thoughts, and passions with others and use your blog to make real connections with people. The mechanics are straightforward, and you'll be able to profit with your blog via online advertising (e.g. Google Adwords), affiliate marketing (see below), and subscriber-based lists to produce a steady stream of income. There are many ways to make money with a blog.
You can work as a virtual assistant through dedicated websites, such as Upwork or Zirtual. All kinds of skills are needed, and compensation can vary anywhere between $10 per hour to $100 or more. Obviously, the higher pay will be to people who have more technical skills, such as web building skills and marketing. But you can find work doing administrative tasks at the lower end of the pay scale.
If you love animals and live in an urban area then walking dog is a viable side hustle idea. People are busy going to work each day and are forced to leave their animals stuck in the house. This is not good for the dog or the owner. Not only because dogs get lonely and need to be around people, but also because they deserve fresh air and the chance to go to the bathroom outside! Offering to walk a group of dogs once or twice a day can really rake in some extra money. You could create signs and hang them up around libraries and churches, or perhaps take the modern approach and sign up with Rover. Rover is an increasingly popular marketplace that connects dog owners to dog walkers in their neighborhood. Check out Rover today.
Keep in mind though, you don’t need a website to do sponsored content since you can also get paid if you have a lot of social media followers. My wife has a pretty big Instagram following, and she gets all kinds of sponsorships. Not only does she get paid in cash, but we get a lot of free stuff, too. We’ve received free rugs, free lights, and free carpet cleaners. She only promotes things she loves though, so this strategy works really well for her.
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