Some subjects are much better paid than others, so although you may love the idea of writing about travel (badly paid) a better bet would be a niche like finance (much higher rates of pay). Check out the Pro Blogger job board for high paid freelance writing jobs – other places to look might be Textbroker or you can look at the “gigs” section on Craigslist.
If you are a fast reader and have a good grasp of grammar and language then editing may be a good freelance role for you. Editing is a great way to quickly make money online, and there are always editing jobs available on freelance job sites. And the best part? Editor’s usually get paid per word, so the faster you can check through work the more money you will make per hour.
As long as there is still the written word, there will always be editors. Freelance editing and proofreading not only pays a decent hourly wage, it also gives you the chance to read about potentially interesting topics too. What's more, pursuing freelance writing & editing as a business idea can afford you a lifestyle that lets you travel the world as a digital nomad. You can find lots of job postings from companies and individuals in need of writing, proofreading, and editing services on Contena, which makes this a high-demand opportunity to make money online.
The Clickbank Marketplace list thousands of products for you to promote. You can sort search results based on commission, sales, popularity and a bunch of other criteria. I like to get a copy of the product before deciding on whether to promote it. You can either email the advertiser for a copy or buy it from them and then refund it if you don’t want to promote it. All Clickbank products are covered by a 60 day money back policy.