Creating and selling courses on your blog can be a successful way to make money online. The course itself should be relevant to your blog, and based on a topic that will benefit your audience. Although it may take time to create the course in the first instance, once completed, you can then repeatedly make money from the course each time you sell it.
Great list! I have another to consider that I personally have 35+ years experience providing. Clean up litter outside commercial properties on foot using inexpensive hand tools. It’s almost as easy to do as going for a walk! I started doing this as a side gig in 1981 and soon grew it into a profitable full-time business. I share my experience in my book, Cleanlots.
A quick and inexpensive method of making money without the hassle of actually selling a product, affiliate marketing has an undeniable draw for those looking to increase their income online. But how does an affiliate get paid after linking the seller to the consumer? The answer is complicated. The consumer doesn’t always need to buy the product for the affiliate to get a kickback. Depending on the program, the affiliate’s contribution to the seller’s sales will be measured differently. The affiliate may get paid in various ways:
Many affiliate programs will often run promotions with good discounts or giveaways that might be attractive to your audience. For example, if you're an Amazon Associate and the site have a big Holiday Sale, it would be the perfect opportunity for you to promote discounts to your website visitors. This is a great way to promote your offers while also providing good value to your audience. 
Re-selling web hosting will enable you to make money hosting your own client’s websites. Large hosting companies like HostGator allow you to white label their hosting services. You could start your own hosting business or, if you are a web designer, include hosting into your web design packages. And the best of it is the hosting companies take care of the hosting for you, so all you need to worry about is selling.
This has become a popular business model for online entrepreneurs over the past several years, and will probably just continue to grow in popularity. The best thing about selling online courses is that once you do the up-front work in creating the course and setting up your marketing strategy, you can get paid over and over again for work you do once.
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