Purchasing a rental property is another common way that individual generate an income stream.  It is very similar to investing, in that you take a sum of money to purchase the property, and the property returns a cash flow – rent.  You do have expenses related to this that are different from investing, such as a mortgage, utilities, property taxes, etc, which all must be taken into consideration when calculating a return on rental property.
This is the best post I’ve seen on passive income streams. I’m similar to you in that I worked in IBanking for a few years but wanted out. My approach is a little different, instead of starting with the CD’s, I’m trying to build up my net worth with riskier asset classes such as stocks and real estate to get the benefit of compounding. Then, as I approach my retirement year goal, I’ll start moving them into CD and bond ladders. In theory at least, it’s best to have the highest net worth just before retirement, then convert them to risk free passive income. You’re method is more patient and probably more practical than mine. I guess I’m willing to take more risks.
Let us start by creating a corpus to invest your money. Let us say you are 25 years of age and earning Rs.75,000 per month after completing your MBA. You can save Rs.10,000 per month in an equity fund as you have other commitments with the rest of the money. But starting off with Rs.10,000 per month in an equity fund SIP is not bad enough. Here is why.
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​If you pay your bills with a credit card make sure it offers cash back rewards. You can let your rewards accrue for a while and possibly put the easy money you earned toward another passive income venture! (Be sure that the card you select doesn’t have an annual fee or you might be cancelling out your rewards). Check out this list of the best Cashback Rewards Cards.
I’ve never invested in real estate (except to live in), but am always intrigued by communities like FS who seem to have such a passion for it. My intrigue stems back to my earlier comments that the long term trends in appreciation in real estate are simply not very competitive versus equities, despite what Robert Kiyosaki had to say in his book, Rich Dad, Poor Dad.
There is no doubt that our grievances against the British Empire had a sound basis. As the painstaking statistical work of the Cambridge historian Angus Maddison has shown, India's share of world income collapsed from 22.6% in 1700, almost equal to Europe's share of 23.3% at that time, to as low as 3.8% in 1952. Indeed, at the beginning of the 20th century, "the brightest jewel in the British Crown" was the poorest country in the world in terms of per capita income.

While it is important to find something that you love to do and turn it into a money making business, you do have to be cognizant of the return as you pointed out. There are many opportunities that I found and tried out that at the time seemed great. But when I took a step back, I realized that I was working a lot for very little income whereas other things I love doing brought in much more money.

Jump up ^ George Forster (1798), A journey from Bengal to England: through the northern part of India, Kashmire, Afghanistan, and Persia, and into Russia, by the Caspian-Sea, R. Faulder, ... A society of Moultan Hindoos, which has long been established in Baku, contributes largely to the circulation of its commerce; and with the Armenians they may be accounted the principal merchants of Shirwan ...
The long-term growth prospective of the Indian economy is positive due to its young population, corresponding low dependency ratio, healthy savings[38] and investment rates, and increasing integration into the global economy.[39] India topped the World Bank's growth outlook for the first time in fiscal year 2015–16, during which the economy grew 7.6%.[40] Despite previous reforms, economic growth is still significantly slowed by bureaucracy, poor infrastructure, and inflexible labor laws (especially the inability to lay off workers in a business slowdown).[41]
We encourage a more holistic, total return approach to your sustainable spending needs from investments.  An improved portfolio includes a wide range of income sources providing both cash flow and capital growth.  Your chosen blend should match your overall financial goals, considering your tolerance for risk, time frames, income and liquidity needs with a spending rate that sustains the investor’s wealth.