If you are expert in some area, you can always give your consultancy service to smaller businesses who cant hire big companies. When we were brainstorming with a client of ours to generate second line of income, he identified that he has some great knowledge in the area of terrace gardening. He could see that he can help families with large enough terrace to setup their own balcony garden and earn some fees over weekends or extra time.

The retail industry, excluding wholesale, contributed $482 billion (22% of GDP) and employed 249.94 million people (57% of the workforce) in 2016. The industry is the second largest employer in India, after agriculture.[153] The Indian retail market is estimated to be US$600 billion and one of the top-five retail markets in the world by economic value. India has one of the fastest-growing retail markets in the world,[243][244] and is projected to reach $1.3 trillion by 2020.[245][246]
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"You know what they say: 'Don't work for your money. Make your money work for you,'" Jenna Goudreau, Managing Editor of Make It, CNBC's new site focusing on all things money, tells Bustle. "That's exactly the goal with passive income: By being smart about the resources you already have, an initial investment of effort can eventually earn you money while you sleep."
In focusing on your wealth management goals, investment income is obviously critical but you might fund your goals from wider sources of income.  A typical long-term portfolio might produce about half its return as income and the other half as capital growth, though in times of duress the capital growth component wanes.  In this low-interest rate climate, some sources of income have become quite expensive and may prove disappointing against your spending needs.  But by tax efficiently and sustainably drawing income from wider sources, you might meet your goals while more prudently balancing risk against reward.