I've made quite a bit of spending money over the last year and a half with the side ventures listed below. Much of them are either passive or something you can do while watching tv, playing games or reading Quora at work.
Amazon’s FBA Program
How To Start An Amazon FBA Private Label Business
When I first experimented with FBA, I failed because I was focused on general rules for Amazon products. I learned from my mistakes and created this guide which goes over everything you need to know to about FBA.
Merch by Amazon
How to Start a T-Shirt Business on Amazon – Merch by Amazon
With so many possibilities to make money online these days and T-shirt business on Amazon (Merch by Amazon) is one of the best possibilities. With the Merch by Amazon print on demand service, you sell only the t-shirts your customers want to buy. You never have to worry about inventory or out-of-pocket costs. To get started, simply set-up your Merch by Amazon account, upload the artwork for your t-shirt, and push submit - Amazon takes care of the rest.
Affiliate Marketing
Making an Affiliate Income from Your Blog
Some affiliate marketing programs are super sketchy, but not the one outlined in this post. This guide will teach you how to make passive income with affiliate marketing in an honest way.
Youtube
How to start successful youtube channel
Having a video that earns a few bucks here and there doesn’t seem like much when you publish each one. But when you have hundreds of them, each one becomes one of the hundreds of little “workers” for your budget over time. Once you get there, even if you don’t publish another video ever, you can expect to earn $$$ completely passively from royalties.
Publishing an E-book
The Complete Guide To Starting a Kindle Publishing Business
Another detailed guide going into the specifics from start to finish of how Brian Yang created his Kindle Publishing business. This guide focuses on how to outsource the creation of the e-books to freelancers.
Website flipping
Spencer Haws purchased several websites with the intention to improve them so he could re-sell them for more. The results? After spending $37,000 to buy websites, he sold them for $119,000 in less than a year. How? Fortunately for us, he documented his entire journey.
Niche websites
The goal was to make $500/month in 6 months via Google Adsense by creating a niche website. By knowing how to find opportunities in niche topics and driving traffic with SEO, he was able to make $800/month with his niche website. This post goes over exactly how he did it.
Shopify store
1 Million Revenue, 0 Employees with an Amazon FBA Business While Traveling The World
In this post, Cory Stout provides a step-by-step case study on how to create your own brand. The post details how to choose a product, how to find a cheap supplier, how to promote your product, and how to automate.
Blogging
How I Would Get to $100,000/m with a Brand New Blog
In this post, Glenn Allsopp doesn’t tell you how to find a niche. Instead, he tells you WHICH niche he sees an opportunity in. Even though this post was written in 2015, I still think the opportunity exists.
Podcast
How to Become a Podcast Millionaire
This post by Glenn (again) covers how 4 entrepreneurs reached millions of subscribers for their podcasts. That’s not all. Glenn also provides a step-by-step guide on how you can achieve success by creating your own podcast.
If you know have any awesome guides and it's not listed here, just comment here and I'll add it to the master list!