For individuals that would have prosperity for writing, you could create a passive income by looking to write an E-book and selling it. As to what else you should know is that most people are turning to audio and visuals with regard to technical subjects and thus it is possible for one to make money by selling audiobooks. Now that you would be looking to read on the different ways that one would be able to make money online, as to what would be the other way to do so would be by creating n application. As to how this would work is that by coming up with a great app, it would be possible for one to reach a large number of smartphone users thus making it possible to generate a passive income from this.
It would be important that you should take note that you would not necessarily have the app-development skills to venture into this mode of income generation as with the right idea, you could then find an individual that would be having the skills. The other mode that one could make money would be considering the use of Mechanical Turk. Regarding these, you should take note that such are small jobs that one would be doing for other people which is what is commonly referred to as human intelligence tasks.
For such individuals that would be having professional experience in social media marketing as well as graphic design, it would be possible for one to make money by offering gigs on Fiverr. At the time you would choose to take this approach to make money, you would need to first find out as to what it is that you would be able to offer then using the Fiverr platform, one could then look to sell their products or services. In the case where one would be having extensive experience in a certain field, one could look to generate money by opting to sell these services on either the Upwork platform or the 99Designs medium.
You should look to note this point as well and this is that through the creation of a blog, one could also generate a mode of income. Another endeavor that you could take up online and which would help you make some money would be email marketing.