But two months later, with the economy slowing down after the financial crisis, his firm began laying people off, and Flynn was informed that after his current projects were finished, he also would be out of a job. At the same time, he couldn’t help but notice that in the LEED exam forums he had frequented, people were referring to him as an expert and directing questions his way. He began to think he might capitalize on that.
Mobile apps are made to help make lives and tasks easier, to develop skills, or to entertain. There are all kinds of apps catering to different user profiles. With almost every individual owning a smartphone or an android gadget, you can make a lot of money by developing and selling your own mobile app. As this article shares, “If you can come up with something unique, you can make quite a bit of money. Simple – yet unique – apps can be pretty passive.”

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I have not. While I am intrigued with the possibility of making online income, it seems to be less passive then how I want to spend my time. Regarding your blog / site, you have done quite well for yourself. However, you have to keep pumping out content or your site would eventually go out of business. That sounds like more of a commitment then I would want. Regarding your book sales, it is probably relatively passive now, but certainly was not when you were writing the book. Now if you love it, great. Just not for me.
​Udemy is an online platform that lets its user take video courses on a wide array of subjects. Instead of being a consumer on Udemy you can instead be a producer, create your own video course, and allow users to purchase it. This is a fantastic option if you are highly knowledgeable in a specific subject matter. This can also be a great way to turn traditional tutoring into a passive income stream!
If you’ve got a book you’re itching to write, you can still go with the traditional publishing route. (We published our first book using a traditional publisher.) Whether your book is fiction or non-fiction, a publisher can help get your book into print and onto shelves in both online and traditional book stores. This is still a good route, although it may take more work and be more expensive than some other options.
In order not to succumb to that, Flynn says it’s important to know your motivation. “Passive income is important to me not just for the financial security but so I can spend time with my family,” he says. “I’ve been able to work from home and witness all my kids’ firsts. I have a one-year-old and a four-year-old, and that's what drives me and gets me pushing through those hard times and why I keep creating new products and why I want to help other people do the same thing.”
There are a couple of problems with direct investment in real estate though. It’s expensive to buy even a single property, a minimum of tens of thousands of dollars, and there’s no way most investors can build a portfolio of different property types and in different regions to protect from those risks when you have all your money in just one or two investments.
Develop a website to purchase and then sell services, such as content articles or purchasing a product at a low price and then reselling it.  Another option is to sell the web design service. Sign a contract with an expert and sell the service to others. This type of business is low-risk and has virtually no start up costs. Sites such as eBay or Etsy.com offer products that can be purchased at a very low cost and then resold to gain a profit.

Residual income can have two different definitions or applications. The first definition, a less common application of residual income, is the money that is left after monthly debts are paid. This calculation is particularly important when a person is seeking financing or a loan based on their income and available money to cover the additional debt. In this scenario, the residual income is calculated by this formula:
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