From what he describes, creating passive income definitely does not sound easy. It requires a serious ramp-up -- often requires 80- to 100-hour workweeks in the beginning, says Flynn. But once up and running, and depending on the content, some sites take fairly minimal maintenance. Green Exam Academy, the LEED exam study site he launched in 2008, takes just him four to five hours a month to maintain but brings in $250,000 annually.
Now that you’ve chosen your market, find a way to start sharing your message, whether it’s a blog or podcast or Youtube channel, or whatever platform makes the most sense for your target market. Flynn says this is where you’ll start to build a fan base — and collect subscriber emails. You don’t need to get the whole world to follow you to make this work out financially. Wired cofounder Kevin Kelly wrote an article about 1,000 True Fans, which basically says that if you have 1,000 people paying you $100 a year, that’s a $100,000 a year. “You don’t need to serve everybody,”  says Flynn.
If you really wanted to acquire residual income while you’re doing some important things, then you can create your own small business in the comfort of your home. You’re assured that this can lend you the best residual income especially if the products or services you’re going to offer really suits to the needs of huge numbers of people. If you don’t know where to start here is a business I’ve joined that may help you to make first steps towards residual income.
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.
In addition to an extra income stream, residual income allows you to diversify your revenue sources. Instead of relying on your standard paycheck, you’re earning money through the royalties of an eBook or the sales of an online course. Diversity of income gives your overall financial portfolio more security and depth. Similar to passive income, residual income gives you more financial stability, flexibility with your lifestyle, additional retirement savings, and a more robust financial standing.

You can’t start charging right off the bat without your audience knowing anything about the value you offer (though you could still indirectly earn money from them with the right ads). “The best way to go in terms of a long-term passive income business [is] delivering value and information for free, and therefore establishing expertise, knowledge and trust with your audience,” says Flynn.

Residual income is money that is earned on a recurring basis, typically as the result of a single original action. Rather than earning an hourly wage, residual income is typically generated through an initial investment of time or money with the goal of earning continuous payments. Once the initial investment, product, or service is made, the ongoing income that is earned is generally passive in nature.
Peerstreet – This residual income option is slightly different, helping you earn money using real estate backed loans instead of the property itself. By helping fund the loan, you’ll earn a percentage of the interest rate charged to the borrower. Most loans are short-term, generally lasting between 6 and 24 months. You can build your own portfolio by choosing the exact loans you’d like to fund, or Peerstreet will choose the loans for you. Again, you need to be an accredited investor, although the minimum investment here is just $1,000.
Residual income is calculated as net income less a charge for the cost of capital. The charge is known as the equity charge and is calculated as the value of equity capital multiplied by the cost of equity or the required rate of return on equity. Given the opportunity cost of equity, a company can have positive net income but negative residual income.