Writing an e-book is very popular among bloggers, as many have noted that “it's just a bunch of blog posts put together!” You will not only have to make an investment of time and energy to create the e-book, but market it correctly. However, if marketed correctly (through blogging affiliates in your niche, for example), you could have residual sales that last a very long time.

While some have degraded the meaning of passive income with cheesy ,get-rich-quick type schemes, it doesn’t mean getting something for nothing. Whether it is investing hard earned capital, sweat, time, or providing a service such as housing, there is a lot given to create passive income. Each party provides something of high value, even if the end product means simply buying income property.
Quitting your job and jumping head first into your internet niche selling business should not be the first move. Be cautious and intelligent about the financial decisions you make; the internet is not a get rich quick place like it can often be portrayed as, but there are real opportunities out there for people who are looking to grab hold of them, and use them to the best of their ability.

2. Real Estate: Real estate is #2 for one simple reason, leverage – using smart debt and other people’s money. When looking at real estate rents and the potential for income real estate provides, it is the trifecta of residual income. First, a home or rental property can appreciate, so capital appreciation is the first long-term benefit of owning a home. Second, rent. Other people are paying the mortgage, insurance, property taxes and maintenance while you own that piece of real estate. Third, tax protection. Rental income is taxed at a lower rate than ordinary income and you can depreciate real estate by taking a paper deduction on your annual tax return not to mention expensing the cost of mileage, mortgage interest, and updates to the property. Rentals done right can generate almost double what the stock market can in dividends and interest. The fourth and maybe most hidden, but important benefit is that over time rent’s rise, protecting your cash-flow against inflation, while your mortgage interest can be at a fixed rate potentially.

I had to get out. I actually had this random Facebook ad come up in my news feed (go figure) and it eventually led me to a webinar that taught on how to start an email marketing business (which is, by the way, the most profitable form of affiliate marketing – or ANY marketing for that matter). I listened through the whole 2 hours, completely mesmerized. By the end of it, I knew what I was going to be focusing on to help my family out of the pit of debt we were in and into a world free of financial stress. I didn’t know if it would actually work, but eventually it lead to EXCESS income!
Anthony, nice setup! To your question about the rental mortgages, you haven’t said what interest rate you are paying. As a start, if you are paying more than the risk free rate (Treasury bills) which you probably are, then a true apples to apples comparison would be yes, pay off the mortgage. But, if you are comfortable taking more risk, you have other options to invest in which you *hope* will yield you more over the coming years. You also didn’t say whether the rentals generate net income and if so, how much? What is the implied rate of return on the equity you have invested in them? If you pay the mortgages off, you’ll have even more equity tied up, will the extra net income make that worthwhile? Maybe you should use the money to buy more rentals instead, if purchase opportunities still exist in your town. … this is less of an answer than a framework to analyze the decision, hope it is helpful.
One of the things I'm surprised your article doesn't mention is the tax advantages of this type of investment. The depreciation and rehab costs (purchasing distressed properties) can be huge deductions to ones income taxes, which none of the others have. Then, along with the appreciation of real estate, this passive income investment outperforms the notion of maxing out my 401k as well.
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.