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. 
Tradedoubler was founded in 1999 by two young Swedish entrepreneurs. They have offices in the UK and multiple countries throughout Europe, including Sweden, Germany, France, Poland and Spain. Their focus has always been to provide smarter results for both clients and affiliates through technology. In 18 years, they’ve amassed an army of 180,000 active publishers, connecting them to over 2,000 merchants in Europe and the UK. Many of these merchants are household names.
If you have a propensity for writing and you can slay with your prose, consider writing an ebook. While the market has certainly become saturated as of late, books that help teach people about a technical topic still sell extremely well. This is a great source of passive income but does require a large amount of effort at the outset before any money is generated.
Tai Lopez has 2.9 million followers on Instagram, 6.2 million fans on Facebook, 1m subscribers on YouTube, and 1.2m followers on Twitter. He is an investor, partner, and advisor to over 20 multi-million dollar businesses. Through his popular book club and podcasts The Tai Lopez Show shares advice on how to achieve health, wealth, love, and happiness with 1.4 million people in 40 countries. The Tai Lopez Show, gets around 800,000 downloads per month. Tai also owns the largest book shipping club in the world, Mentor Box, and was voted the Number 1 Social Media Influencer by Entrepreneur Magazine. He has interviewed: Kobe Bryant, Hilary Clinton, Rihanna, Jordan Belfort, Steven Spielberg, Mark Cuban, Chris Paul, Caron Butler & more. Get writing!