Liquid Funds are those mutual fund schemes which are ideal for putting money for a very short period of time, preferably not more than three months. Since these funds invest in extremely short term Debt papers, they come with very low volatility and risks. Accrual funds are those funds which invest in Debt papers of short and medium tenures to generate interest income. These funds usually do not take any interest rate/credit risk but stick to earning interest.

After employment, I think that most individuals gain income diversification through investing.  It is important to look at why we invest: because at some point we plan on using this money for something.  For most, it is saving for retirement, and the investing is done through vehicles, such as a 401(k) or IRA.  But investing is not just about stashing money away for a rainy day – that is what an emergency fund is for.  Investing is about having enough capital to generate income.
This is an interesting take and good advice for those who probably do not need to ever worry about becoming destitute. I’m sorry but too many of your options including your own list of income require quite a bit of initial investment/capital and these suggestions are useless to those living paycheck to paycheck. I’d like to see the average low to middle income household purchase additional property for rental, invest in their portfolio (if they can even start one), or even afford to have a vehicle or room to rent. Far too first world of a solution for the general public.
A normal distribution (bell curve) is the limit of what one would find by adding up the value of many independent quantities such as the height of people in a large group. A power law distribution is the limit of what one would find by multiplying the value of many independent quantities such as the relative size of forest fires over a large enough area and a long enough period of time.

Peer-to-Peer Lending: Earn up to 10% in returns by lending individuals, organizations and small companies who don't qualify for traditional financing through peer-to-peer lending platforms like Lending Club. You can lend $100, $1,000, or more to borrowers who meet lending platform financial standards. Like a bank, you'll earn interest on the loan - often at higher returns than banks usually get.
Poverty rates in India's poorest states are three to four times higher than those in the more advanced states. While India's average annual per capita income was $1,410 in 2011 – placing it among the poorest of the world's middle-income countries – it was just $436 in Uttar Pradesh (which has more people than Brazil) and only $294 in Bihar, one of India's poorest states.

Until the liberalisation of 1991, India was largely and intentionally isolated from world markets, to protect its economy and to achieve self-reliance. Foreign trade was subject to import tariffs, export taxes and quantitative restrictions, while foreign direct investment (FDI) was restricted by upper-limit equity participation, restrictions on technology transfer, export obligations and government approvals; these approvals were needed for nearly 60% of new FDI in the industrial sector. The restrictions ensured that FDI averaged only around $200 million annually between 1985 and 1991; a large percentage of the capital flows consisted of foreign aid, commercial borrowing and deposits of non-resident Indians.[278] India's exports were stagnant for the first 15 years after independence, due to general neglect of trade policy by the government of that period; imports in the same period, with early industrialisation, consisted predominantly of machinery, raw materials and consumer goods.[279] Since liberalisation, the value of India's international trade has increased sharply,[280] with the contribution of total trade in goods and services to the GDP rising from 16% in 1990–91 to 47% in 2009–10.[281][282] Foreign trade accounted for 48.8% of India's GDP in 2015.[11] Globally, India accounts for 1.44% of exports and 2.12% of imports for merchandise trade and 3.34% of exports and 3.31% of imports for commercial services trade.[282] India's major trading partners are the European Union, China, the United States and the United Arab Emirates.[283] In 2006–07, major export commodities included engineering goods, petroleum products, chemicals and pharmaceuticals, gems and jewellery, textiles and garments, agricultural products, iron ore and other minerals. Major import commodities included crude oil and related products, machinery, electronic goods, gold and silver.[284] In November 2010, exports increased 22.3% year-on-year to ₹850.63 billion (US$12 billion), while imports were up 7.5% at ₹1,251.33 billion (US$17 billion). The trade deficit for the same month dropped from ₹468.65 billion (US$6.5 billion) in 2009 to ₹400.7 billion (US$5.6 billion) in 2010.[285]

Most of us think of investment income as just the cash flow we get from bank interest, bonds, share dividends and property rents, some of which comes via a super pension.  But a more complete view is to also consider how growing the value of your investments can add to your spending potential.  This total return approach generates income from both income and growth to optimise spending from your portfolio across all market cycles, aligning cheap and expensive investments to your goals.