If you’re looking for inspiration, my friend Michelle Schroeder-Gardner of the website Making Sense of Sense has become the expert on all things affiliate marketing. Michelle earns more than $100,000 per month from her blog and the bulk of her income comes from affiliate sales. Michelle has had so much success with affiliate marketing that she even has her own course called Making Sense of Affiliate Marketing.
If you live in an area where Uber or Lyft operate, why not become a driver? If you're looking to make some short-term cash, you can definitely rake it in by working for one of these popular car-hire apps. As long as your vehicle fits within the specifications of their program, and you have a clean license, you could do this on the side, especially if you're in a crunch for cash.
Before I talk about some of the methods for making money online, I wanted to address the role of pain versus pleasure. Every decision that we make in life is weighed on a pain-versus-pleasure scale. We will always do more to avoid pain than we will to gain pleasure, plain and simple. However, this is also what holds us back from succeeding in any endeavor.

There's a proverbial gold rush happening today, of people trying to launch chatbots for their businesses to help automate some of their sales and marketing efforts that are needed to properly grow and scale in today's market. However, similar to California's Gold Rush, those that will likely get rich are the ones that sell the picks and shovels. For that reason, why not launch your own chatbot business? Sure, there's some effort involved here, but this is definitely worth the steep learning curve.
People are always looking to have their cars washed and detailed. You could be a mobile car washer and detailer without having a permanent location. Reach out to people you know or make some flyers and put it in your neighbors' mailboxes. If you want to get serious about it, prop up a one-page website or give out business cards. You can make money quickly doing this.

Once you’ve gathered a list, put together an outreach email template (as you’ll be doing this over and over) that’s short and clear with expectations. Tell your potential interviewee who you are, what your podcast is about, and what you’re asking of them. Do a few test interviews with friends and family to make sure everything is being recorded at the quality you want and then book your first episode.
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.
 @Philip Taylor I was merely using medical science as an example profession. It’s quite obvious that you don’t have any professional courtesy and downplay professions in which you don’t understand. Logo design isn’t just logo design. I don’t know what the profession of a public accountant entails, or a lawyer perhaps, so I’m not going to give advice on matters that I don’t especially have knowledge in.
Direct Sales Home Businesses – Host “parties” at your home to get discounts and a little cash, or become an independent sales rep yourself to make even more money.  Many of them offer online shops that you can set up under your name.  Some of the most popular ones are:   Avon, Mary Kay, Tupperware, Thirty-One Gifts, or Pampered Chef; there are also numerous companies selling candles, jewelry, children’s books, children’s clothes, etc.)
Startup costs: Freelance writing is another of those service-based businesses with very low start-up costs. There are tons of places online where you can find clients for free. At worst you can sign up for an Upwork account for $10 per month, just don’t plan on staying there forever. The most lucrative writing projects are rarely found on platforms like Upwork.
Hold a yard sale. If you have a yard or garage and plenty of items to sell, you can have a yard sale as early as tomorrow. By advertising your sale on local Facebook pages and Craigslist, you can also skip the paid newspaper ad and keep all of the profits for yourself. If you don’t have time to price everything, try asking patrons to “make an offer” or grouping similar items on tables with an advertised price (e.g. everything on this table is $5).
If that approach doesn’t interest you then head over to Google Trends and look for a trending topic. Ideally this will be something you find interesting, but that’s not an absolute requirement here. Then create a piece of content on that same topic, sign up for a free WordPress account and post it there. Voila – you now have one “clip” for your writing portfolio.
Ebates: This app offers a simple way to make money online by buying whatever you're already buying and then getting a cash-back reward. With eBates, there is no scanning receipts. Simply click a link in the app and buy it from the store. You'll automatically be credited with your cash rewards upon purchase along with receiving an email confirmation.  
Websites like Care.com connect parents with babysitters. The company does all the background checking and other due diligence to put parents' minds at ease. Of course, you can appeal directly to people in your personal network, but if you're looking to generate recurring revenue sign up with a site marketing to parents looking for child care services.
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