2. eBooks: As bloggers, we solve problems. Think about some of your most popular posts or the questions your readers are always asking you about. Could you expand on those posts to create a short eBook you could make available for sale? Could you do the same with answers to those FAQs? eBooks are inexpensive offerings and a great way to dip your toes into the world of product creation. You can not only offer them for sale on your own site, but also on Amazon Kindle.

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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.