Wow! What an awesome list! My favorite is the stock photography because I love photography. I have had some success there, particularly with one photo I make some decent income from. I think the key with stock photography is finding a shot that is high demand. Then, find a new unique way to frame that shot. This is the reason my St. Louis Arch photo is a top 10 on both ShutterStock and iStockPhoto. Thanks for the awesome ideas above!
So one thing I have to disagree with after having done hours and hours of research from Multiple CPA’s is “Dividends – 21% (passive)”. Thats actually not right. Thats actually “active”. I actually paid 2 different CPA’s to do research on this topic. One of them I paid 500 dollars to actually dig out the IRS tax code and “prove” it. If you are active in a business and the business pays you dividends its still active income (not passive).

A business thrives or fails depending on its marketing and system for generating leads. You need leads to make sales. No audience or exposure means you won’t get fresh faces checking out what your business does. Too many entrepreneurs spend all their time on the “busy work” and not enough on audience building. There are some great ways to build an audience and generate new leads:

So, it’s like the 7 Deadly (S)Incomes? Ha. Bad joke. I never really thought to count them up or even name them but I’m a big fan of having multiple streams of income. Let me count. 1) Earned income (freelance pharmaceutical copywriter) 2) Royalty income (published book) 3) Interest income (savings accounts) 4) Business income (my personal finance blog) 5) Pension beneficiary (RIP daddy) Crap. Only five and only 1 that pays anything substantial. Hmmmm. Time to brainstorm. Thanks, Doc.
Do you want to earn $100, $1000 — or even more — on the side? You can start earning extra income today with the help of this list of ideas I’ve put together. Spend an hour or two each day working on items that are practical for you, and you can build alternative income sources to help you improve your financial situation  While many of the items on this list are passive income ideas, not all of them are. Some items require you to actively work for success.
The other point is that it is pretty easy to get started.  You don’t need to be super rich, and you don’t need a lot of time to get started.  To say it requires no time would be a lie, but you don’t need to make anything listed above your life.  You can work at your job, invest your excess income, save to buy a rental property or rent out a room in your current house, and you start a side job online without breaking a sweat.
Unlike your paycheck, which you earn for actively working, passive income is money you earn or receive for minimal day-to-day effort, such as rent you receive from your tenants if you own rental property. Although age-old strategies like real estate investment continue to lead countless investors toward financial independence, the digital age has opened the door to new ways of generating passive income, including P2P investing, e-book publishing and even blogging. Like a lot of passive income streams, some work will be required of you upfront, but once established, you can let the income come to you with little to no work on your part.
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 thing is, I’m not talking about buying brick-and-mortar buildings. I tried that many years ago with my father-in-law, and with devastating results. We tried to buy a duplex once, and the deal fell apart after we realized we weren’t really prepared for the purchase. I secretly wanted to become a landlord, but at the same time, I knew it wasn’t for me.
"Multiple Streams of Income" by Robert G. Allen is a book is full of great information on how to free yourself from "the rat race." Although some of the information is outdated for our current economic climate, the information is still valuable, and heartily recommend the read. There are many chapters of relevant information to balance anything you may consider unusable. He teaches you that there are many ways to earn money outside of a regular job. He also leads you through determining which avenue is right for you, and gives you all the tools you need to get started on the basics. "Multiple Streams of Income" has helped me alot.
If you have a spare bedroom, you can find a roommate or list the space on AirBnB for travelers. Having a roommate is the more passive of the two, as being an Airbnb host will require more work in the form of turning over the room between stays. This is a super painless way to earn $500 to $1,000 a month without much effort – you may even be able to cover your mortgage payment with this extra income!
Making legitimate passive income isn’t as difficult as you might think. Some of the best passive income ideas might take a little time to set up but can start cash flowing within a couple of months and will provide a consistent monthly income for years or more. The most important point is just to get started. You make exactly $0 on the passive income sources you never start.
“I don’t believe the overnight success exists. There’s a lot of hard work and time involved beforehand,” say Flynn. Angry Birds may have seemed like an overnight success but it was the 52nd game that Rovio created. Flynn says it took him a year or year and a half to build audiences for his most successful sites. (Read these time management expert's tips on the work habits of successful people.)
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