Find a profitable niche. Starting with your interests, write down as many niche ideas as you can. Think about topics people might search online. Ideas include passions (like surfing or body building), fears (like spiders or speaking in front of crowds) and problems (like getting out of debt). Do keyword research to see it others are interested in the topic. Find out if a domain name is available that matches the keyword 100 percent. 
You can sell your ebooks through Amazon's Kindle program or Apple's iTunes Connect, which gives you access to a large majority of the digital-book reading market and the barriers for entry are incredibly low. You don't need to invest lots of money to make this happen, but you do need to invest lots of time, not only in writing the ebooks, but in marketing them as well. 5 Real Ways to Earn Money Online from Internet
If you want to help shape digital products in their early stages, joining an online focus group or answering survey questions is a great way to make extra money online. They don’t pay as much as some of the other options we’ve highlighted, but you can join groups on sites like Survey Junkie, Swagbucks, and IPSOS that pay out through Amazon gift cards, check, or PayPal. You’ll be asked to provide a bit of information about your demographics (age, location, etc…), but after that you can get going making money through surveys. Make Money Online : 13 Real Ways I Make Money Online (2018)
– Project Payday is one of those sites that has testimonials of people who have earned thousands of dollars by getting paid to get trial offers. I’m not saying you’ll earn thousands, but it is legit and you can earn some extra cash. They assume that by paying you to do a free trial, you’ll either like the product and purchase it, or forget to cancel the trial and get charged for it. If you can keep track and cancel before you get charged (if you don’t want the product), then this is a great site for making some money.
Join a startup accelerator: Another great option is to apply to a startup accelerator like Y Combinator, 500 startups, or TechStars, where a group of investors will help coach you, connect you with potential partners, and provide startup cash in return for a small stake in your company. The competition is tough to get into these, so don’t rely on them as your only path forward.
The key is to make the class sound unique and irresistible. Don’t just teach a cooking class; come up with specialty cooking classes. You might teach a class on how to make artesian breads, or cinnamon rolls that rival Cinnabon. The possibilities are endless, and if you consistently offer educational and fun classes, you’ll have people signing up over and over again.
How to Get It: Visit companies such as DarwinsData.com, PineconeResearch.com and PaidViewpoint.com. (Search "surveys" on RealWaystoEarnMoneyOnline.com for more options.) Then sign up with as many sites as you can. The sites will contact you when surveys that fit your demographic pop up, and you take them right away. A word to the wise: Do not register anywhere that has a membership fee, asks for your Social Security number or bank information, or is vague about payment. There are many survey services out there that are fraudulent. How to earn lakhs of money from Flipkart, Amazon without selling any products Earn money online