The original version of Barbara Winter’s book, Making a Living Without a Job, came out in 1993, and in it, she recommended creating multiple "profit centers," as opposed to building a single income stream. Over ten years later,  Robert Allen, the real estate entrepreneur, also wrote a couple books promoting the idea of multiple streams of income. Back then, building more than one source of income was difficult, time-consuming, and expensive. Fortunately, things have changed today. The Internet has made it easier, faster, and more affordable to generate multiple income streams.
Taking Paid Surveys at Home: I was skeptical, at first, until my 17 year old son starting making money at home taking paid surveys. Companies desperately want your opinion, and they are willing to pay for it. The trick, of course, is knowing where to find the paid surveys that pay the best. One of the most popular and legitimate survey sites is Swagbucks. Not only can you make money taking surveys, but you can also make money by watching videos and even surfing the net. They also offer significant cash back for online shopping.

The first time I did affiliate marketing was way back in the day on my architecture exam website. I connected with a company that sold practice exams, which gave me $22 for every person who bought one of their exams via my site. Since then, I’ve generated over $250,000 simply by recommending that product alone. Again, this is a product that was not mine, but one that has still been helpful to my audience. This was all done with thousands of visitors a month. Not millions, or even hundreds of thousands.
The main leakage from this sector are imports (M), which represent spending by residents into the rest of the world. The main injection provided by this sector is the exports of goods and services which generate income for the exporters from overseas residents. An example of the use of the overseas sector is Australia exporting wool to China, China pays the exporter of the wool (the farmer) therefore more money enters the economy thus making it an injection. Another example is China processing the wool into items such as coats and Australia importing the product by paying the Chinese exporter; since the money paying for the coat leaves the economy it is a leakage.
Mr Raman, age 32, works for a bank as a senior manager. He earns Rs 50,000 per month take-home salary. His wife works as a school teacher earning Rs 15,000 per month. Raman had, earlier in his career, sold life insurance policies as an agent earning roughly Rs 50,000 per annum (Rs 4200 per month) as renewal commission every year from those policies sold. Raman has a flat of his own plus a small investment property in neighbouring suburb giving him Rs 15,000 p.m. rent. Raman has a decent small savings portfolio giving him an interest of Rs 5,000 per month. Raman believes he will increase his savings income from Rs 5000 to 15,000 in 5 years time as he plans to save all of his annual bonus (Rs 1.5 lacs per annum) every year.
Managerial accounting defines residual income in a corporate setting as the amount of leftover operating profit after all costs of capital used to generate the revenues have been paid. It is also considered the company's net operating income or the amount of profit that exceed its required rate of return. Residual income is normally used to assess the performance of a capital investment, team, department or business unit.