E-Commerce is growing on a huge scale globally, including India. It can be a source of your second income and you can earn lakhs of money on monthly basis. You don’t need a big amount of investment to start your E-commerce business. You can create your own eCommerce website without any hassles, or you can also hire a professional to create your website. Once a website is set up, invest a bit in digital marketing of your website and its products/services and you are all set! E-Commerce business can provide you with a source of income on regular basis without much effort. You do not need to set up a physical office or hire hundreds of employees unless you want to be the next Flipkart. Even a small eCommerce business can fetch decent monthly earnings without much spending or hassles.
I’m a 45 year old business owner who also has focussed on diversifying my income streams. I have a short term vacation rental in Florida that I bought for $390k in 2012 and net rental income for the last three years has been growing steadily. 2015 I am at $70k gross right now but should end up at $80-85k with net around $45k plus we use the place about 35 nights a year.
Audiobooks are witnessing a surge in popularity when compared to their text-based counterparts. If you have decided to write and publish an eBook, converting it into an audiobook requires little effort and is a great way to bolster your income. Amazon's Audible ACX platform connects authors with producers who can turn their written work into professional grade audio. Once that's done, the audiobooks are put up for sale on Audible and iTunes.
The obvious way to earn a second income is to get a part-time job. If you are not currently working, this is an excellent way to start as it gives you the freedom and flexibility to start other passive income opportunities.  The other option is to simply work from home full time which frees up commute time so you can focus on building more income streams.

Business Income: Contrasting to the self-employed ones, the business owners do not do all the work on themselves. In fact they get things done by different set of people working for them and they run the business. They create a system which then functions smoothly even with minimal supervision. This calls for a much less risky position and allows you time to build more and more income sources for yourselves.
Haha, that is too funny. I wanted to make an app back in the day called “MyShares” (You can probably tell how I cam up with the name at the time). The idea was that I would loan out books and DVD’s and then would never get them back. Then I thought, how cool would it be if I could rent those items out and that would motivate people to bring them back. Obviously, books and DVD’s are cheap, so this isn’t the money maker. The idea that would probably make the most money would be things like tools, ATVs, etc.
I just started out with Affiliate Marketing (idea # 8) and it is not as easy as people make out to be. For me the hardest part so far is learning Search Engine Optimization (SEO) and driving traffic to my website. I m only 3 months into it, but I am confident that the site will begin to generate some income, I have give it 6-9 months, so we’ll see.

In early modern Europe, there was significant demand for products from Mughal India, particularly cotton textiles, as well as goods such as spices, peppers, indigo, silks, and saltpeter (for use in munitions).[71] European fashion, for example, became increasingly dependent on Mughal Indian textiles and silks. From the late 17th century to the early 18th century, Mughal India accounted for 95% of British imports from Asia, and the Bengal Subah province alone accounted for 40% of Dutch imports from Asia.[81] In contrast, there was very little demand for European goods in Mughal India, which was largely self-sufficient.[71] Indian goods, especially those from Bengal, were also exported in large quantities to other Asian markets, such as Indonesia and Japan.[82] At the time, Mughal Bengal was the most important center of cotton textile production[83] and shipbuilding.[84]
I also noticed that in your passive income chart at the bottom that you don’t include your internet income other than sales from your book. Is there a reason for that? Do you not consider is passive because you are actively blogging all the time to create it? Or do you just not want readers to know how much money you generate from blogging activities?
As interest rates have been going down over the past 30 years, bond prices have continued to go up. With the 10-year yield (risk free rate) at roughly 2.55%, and the Fed Funds rate at 1.5% (two more 0.25% hikes are expected in 2018), it’s hard to see interest rates declining much further. That said, long term interest rates can stay low for a long time. Just look at Japanese interest rates, which are negative (inflation is higher than nominal interest rate).
Portfolio income can come from multiple sources – interest/bond coupons, stock dividends, financial strategies including derivatives and capital growth.  Each offers some cash flow and some also offer potential capital gain with some risk from liquidity and volatile prices.  In this low-yield environment, many investors rely too heavily on cash flows and to pursue this are venturing further into riskier areas than they’d normally consider.