I have already come up with 50 ways that a management company can screw you for profit without you ever knowing(or not finding out for awhile). Did you have an inspection before you made an offer on the property? Do you have a picture of the property you bought? How do you know if that picture shows the house you actually own? or if it even hows the ‘current’ state of the house you own?
Stocks (shares) paying dividends are typically a reliable source of income but they have higher risk of capital losses than cash and bonds. So, it’s wise not to chase yield indiscriminately.  The 10 highest yielding stocks on the ASX 200 (the 200 largest companies in Australia) are shown in the table below.  But their share price performance on average over the last year has been underwhelming, as shown in the far right column:
This can be a little easier said than done, but if you have a large social media following, you can definitely earn money promoting a product or advertising for a company. You can even combine this with different marketing campaigns if you are an influencer and have your own blog (advertisement + affiliate income). This is how many bloggers make money! Again, it is not 100% passive but once set up correctly and then scaled, can be surprisingly lucrative.

As an struggling young Engineer (back in the Carter era) I bought anything I could renovate then rent to justify paying the 18% interest. I never took vacations but worked on my properties all in the pursuit of passive income. I drove junk for many years & many months I just got by on credit cards. My friends & colleagues were amused by my ‘stupidity’ but most are still working to make enough for retirement.
Wages received for services rendered inside the territorial limits of the United States, as well as wages of an alien seaman earned on a voyage along the coast of the United States, are regarded as from sources in the United States. Wages or salaries for personal services performed in a mine or on an oil or gas well located or being developed on the continental shelf of the United States are treated as from sources in the United States.
"For long-term savings, investing in low-cost index funds is the ultimate passive strategy," Goudreau says. "As legendary investor Warren Buffett recently told CNBC’s On the Money, 'Consistently buy an S&P 500 low-cost index fund. I think it's the thing that makes the most sense practically of all time.' By not picking individual stocks and, instead, buying a low-cost fund that tracks the market, you pay less in fees and take less of a risk. Then you can sit back and watch your money grow over time."
* I use Personal Capital to track all my finances in one place. It’s much easier to use their free software to follow 28 accounts on one platform than to log into various accounts to check my balances. They’ve also got great tools for x-raying your portfolio for excessive fees, recommending a more optimized asset allocation, and planning for retirement with their Retirement Planner.

I like to think about having an additional source of income as being sort of like an insurance policy. I interviewed one young woman who taught aerobics classes in the evenings after spending her days working as a videographer for news organizations. When she was unexpectedly laid off from her day job, she quickly doubled her aerobics teaching load and was able to keep herself afloat until she found a new full-time job. Some more examples of income multi-streaming are a teacher I know who sells used baby clothes out of her home and a young couple who run a small Internet business on the weekends. Just like these people, you can also pick a profitable project or create a business that matches your lifestyle. 
How do you do this?  Well, try to get the highest paying job you can!  Ask for a raise!  Utilize services, such as Glassdoor.com, to see how your salary competes with others in your same job.  Some companies really force employees to leave to get a raise, and then come back for another raise.   This industry jumping promotional strategy is very common and could work.
Right now we have five, but we’ll probably cut that down to four at ER next year. Current: W-2, business income, rental income, interest on personal loan plus accounts, dividends and cap gains. Future: subtract W-2 for the most part, not counting little “fun work” projects. If we were looking to live the high life, we might aim for the millionaire’s seven sources, but we feel like our four sources will let us live very comfortably with plenty of contingency plans in place. 🙂
Making money in addition to a regular income can have a big impact on your finances. An extra $500 per month could go a long way in paying down debt or raising your investment. Diversifying your income streams is important, especially as wage remain stagnant. You decide how you want to produce the income. Either you ‘do something’ to generate the income- this is active income such as providing a service; or the income is generated without you having to ‘do anything,’ – this is passive income such as hosting an Airbnb. Just make sure you do not place all your eggs in one basket.
Whether you take a “distribution” (aka free-cash-flow) in the form of a dividend, interest payment, capital gain, maturing ladder of a CD, etc, you are still taking the same amount of cash out of your portfolio. Don’t fall for the trap of sub optimizing your overall portfolio’s performance because your chasing some unimportant trait called “income”.

But when so many turn down leasing one and one-half acre for one Wind Turbine for each 80 acres, that lease certainly does not materially affect the rest of the Farm or Ranch grazing pasture and the lease pays much more than the farm crow or grazing pasture lease, just because some lawyer said the lease was too long: 30 years plus 30 year option = 60 years, and the wind turbine company has selling production/electricity contracts for the next 150 years – which is needed to obtain financing!
The theoretical generalization to more than one period is a multi-period wealth and income constraint. For example, the same person can gain more productive skills or acquire more productive income-earning assets to earn a higher income. In the multi-period case, something might also happen to the economy beyond the control of the individual to reduce (or increase) the flow of income. Changing measured income and its relation to consumption over time might be modeled accordingly, such as in the permanent income hypothesis.

My returns are based on full cash purchase of the properties, as it is hard to compare the attractiveness of properties at different price ranges when only calculating down payment or properties that need very little rehab/updates. I did think about the scores assigned to each factor, but I believe tax deductions are a SIGNIFICANT factor when comparing passive income steams.
I remember seeing a number of my co-workers get laid off in 2008 and many of them had only worked for the one company. They had mortgages to pay, colleges to pay and families to support and they were scared out of their minds for what they would do next. After watching that happen, I vowed that I wouldn’t suffer the same fate. It’s one of the main reasons I started my own company. I tell people now that instead of one boss (i.e. one company), I have hundreds of bosses and it makes me feel more secure about my longterm prospects.

Awesome article…if this does not give somebody a clear roadmap, they probably were never going to get there in the first place! I’m kind of like you trying to figure out where to place “new” money and maturing CD’s in this low interest environment. Rates have to go up eventually…I dream of the days again where you can build a laddered bond portfolio paying 8%. I plan for a 5.5% blended rate of return, with big downside protection.
For those willing to take on the task of managing a property, real estate can be a powerful semi-passive income stream due to the combination of rental and principal value appreciation. But to generate passive income from real estate, you either have to rent out a room in your house, rent out your entire house and rent elsewhere (seems counterproductive), or buy a rental property. It’s important to realize that owning your primary residence means you are neutral the real estate market. Renting means you are short the real estate market, and only after buying two or more properties are you actually long real estate.
Income from the performance of services directly related to the use of a vessel or aircraft is treated as derived entirely from sources in the United States if the use begins and ends in the United States. This income is subject to nonresident alien withholding if it is not effectively connected with a U.S. trade or business. If the use of a vessel or aircraft either begins or ends in the United States, refer to Transportation Income in Publication 515, Withholding of Tax on Nonresident Aliens and Foreign Entities.