A linear income is when you trade your time for money. It’s also known as a work income. The paychecks that you receive are based on the amount of work you do. In this kind of income, you are required to put in hours of work every week. If you stop working, you also stop earning. Hence, linear income requires you to continue working in order to keep earning an income.
You can find dividend stocks using Google Finance Stock Screener which is free to use. Set the search criteria for the P/E Ratio, and Dividend yield (shown as a percentage) criteria. You can set minimum and maximum values; in the dividend yield box, set it between 2 and 100. This will search for stocks that pay dividends worth between 2-100% of the current stock price.
Investing in a business: Another good way to generate passive income is to invest in a business --even a small one -- in return for a percentage of the profits - just like Shark Tank, only smaller. Lending $10,000 to a local business that, for example, is working on a mobile app for Apple phones could lead to a passive income-generated share of the profits when that mobile app starts selling like hot cakes.

Another thing, there is nothing like the astounding proud feeling of owning a successful business. This is a feeling that no salary or pay raise can bring. Owning your own successful business will do wonders for your self-esteem and family life. Creating something from nothing will give you a sense of accomplishment that you never thought possible. As many have said before, “…nothing risked, nothing gained.”

If you’re worried about launching a new product, and think you might need some feedback to make it really good, Flynn recommends “pre-selling” an idea — for instance, offering a limited number of spots or seats into, say, a course you create and giving the test group specialized attention so you can see how to improve the content. Once it’s revised (or, if it’s software, once all the bugs are removed), you could open it up to your whole audience.
During that time I’ve met many top earners who you would think had achieved the mythical walk away income, but guess what…? They are still working today, some in their 2nd or 3rd company since I’ve known them! So where is the walk away income? I say it doesn’t exist. I have known reps who have had 100’s of thousands of distributors on their teams at one time and now they are rebuilding and doing it all over again still promoting walk away income. It makes me want to scream! They can’t see that 99.9% of the people can’t do what they do and they can’t even achieve the mythical income. – Source Ezinearticles.com

In equity valuation, residual income represents an economic earnings stream and valuation method for estimating the intrinsic value of a company's common stock. The residual income valuation model values a company as the sum of book value and the present value of expected future residual income. Residual income attempts to measure economic profit, which is the profit remaining after the deduction of opportunity costs for all sources of capital.