Great points in the article. The key which you have hit on quite well is scalability and making the most bang for your time investment. Many resort to the Internet because of its scalability. There are plenty other options for one who simply wants to trade hours for dollars. I also like the point of finding your passion and monetizing it. Lastly, I agree with mixing and matching. Many are afraid to experiment, but the beauty of the internet is that it is very forgiving. One can keep trying until the right blend is found.
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 also create a survey and then set up custom audience panels to target Google Opinion Rewards users you’d like to reach. The rewards you get won’t pay your bills or anything, but each survey rewards anywhere from ten cents to a dollar. Though it looks so less, it can be helpful for buying a couple games and getting free movie rentals from the Google Play Store. Google Play credit even works on in-app purchases, in which you can buy Pokeballs or comic books.
Use a site like Upwork or Freelancer to search for virtual assistant gigs. Although these won't pay you a fortune, they will allow you to do small paying jobs from the comfort of your own home via a simple Internet connection. If you're good at online research and other business related tasks, this might be the best idea for making a little bit of cash online.
Plus, you can use another free app called Paribus. This price-tracking app negotiates a refund if something you buy goes on sale. Want an example? Let’s say you buy a tv, and it goes on sale three days later. You can get a price protection refund. Using Paribus is an easy way to monitor shopping purchases. Let’s face it, most of us don’t know about these claims.
Start a bed and breakfast. If you live in a popular resort area or own a historic property, a B&B might be the perfect side hustle. Not only can you work at home with this career, but you’ll also score some tax write-offs in the process — although most innkeepers caution that the profession requires a lot of hard work and is more of an attractive lifestyle than a money-making pursuit.
Bloggers and webmasters are always looking for new and unique content for their blogs and websites. Digital point forums can be a good place to start making decent money even though its full of scammers and spammers. You will be paid $2-$10 per article depending on the quality. You’ll be instructed on the quality of articles, niche, number of words, etc. while making a deal.
Yet another Amazon service providing the possibility to make money online is the Audiobook Creation Exchange. You can create a standalone audiobook, or create an audio version of your eBook as complementary media. And you can narrate your audiobook yourself, or Amazon can put you in contact with a professional to help. Once sold, you can then earn up to 40% royalties per audiobook.