If you’re into antiques, for example, you could check out garage sales for hidden deals then capitalize on your knowledge to turn a profit. Perhaps you’re into video games, specific brands of clothing, or something else. Whatever it is, with a little research, it’s possible to turn your knowledge into cash with an eBay store. Best of all, you can sell from the comfort of your own home.

I wish I had more time to put into real estate. Given the run up since 2012, I may even be interested in selling my condo that I currently rent out. I need to get it appraised to really see what it’s worth, but I think conservatively it’s gone up ~50%, although rent is probably only up ~10% or so. I am bullish on rents going up in the future… mostly in line with inflation, or perhaps even slightly faster due to constricted credit and personal income growth which should provide a solid supply of renters. At this point, I just don’t want to manage the property. I’ll probably look into a property manager as my time is likely worth turning it into a nearly passive investment.
"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."

For those of you who don’t want to come up with a $220,000 downpayment and a $900,000 mortgage to buy the median home in SF or NYC, who don’t want to deal with tenants or remodeling, and who wants to not do any work after the investment is made, check out RealtyShares. They are my favorite real estate crowdsourcing company based in San Francisco. I’ve met senior management multiple times as well as their chief risk officer and various members of their investment committee.
Or, there is another theory for your primary salary – generate enough to have a little excess cash flow, but do it at a place that you can work stress free and have time to dabble in other projects.  A good friend of mine has this setup – he works 10-5 and makes $50,000 a year.  This allows him to easily cover all of his expenses, but the shorter hours and flexibility in his job allows him to pursue his secondary income generating ideas!
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.
Coaching – I’ve been coaching ever since I was in college and I love it. And since I coach a club team, the time commitment averages only about 10 hours a week. The money isn’t great if you depend on it for living but it’s the perfect secondary source of income since it’s very easy for me to get hired as a coach(and it’s tax free through business deductions).
How To Engineer Your Layoff – In 2012, it took me four months of absolute focus and two years of data to publish my first e-book about helping people negotiate a severance. The book went through over 30 revisions by four people. Then I updated the book for 2018 with 50 more pages (150 pages total) using more successful case studies and highlighting more strategies for those who want to break free with money in their pocket.
As a private lender, you can lend to anyone in your social circle. For example, many home rehabbers need access to a source of capital they can tap into very quickly in order to fund the initial purchase of their properties. You can partner with a rehabber who uses your capital for a short term in exchange for an interest rate that is mutually agreed upon.
Passive income differs from active income which is defined as any earned income including all the taxable income and wages the earner get from working. Linear active income refers to one constantly needed to stay active to maintain the stream of income, and once an individual chooses to stop working the income will also stop, examples of active income include wages, self-employment income, martial participation in s corp, partnership.[4] portfolio income is derived from investments and includes capital gains, interest, dividends, and royalties.[5]
1) If your property is not under rent control, you have the ability to raise rent to market prices with proper warning. In SF, I have to give tenants a one month warning for up to a 10% increase and a two month warning for up to 60%. Rent control limits to an inflation index, usually around 2% a year, which is why initial pricing and tenant turnover is important for better profitability.

And, let’s face it; not everyone wants to sling body wraps or nutrition shakes to their family and friends. That’s why offering a service is often one of the best, and least uncomfortable, ways to earn side income doing something you love. Maybe you want to clean houses or rake leaves or help people file their taxes. It’s totally up to you, and that’s the beauty of this option.