This is mostly passive once you have it all set up, but it does take a lot of work at the beginning. Real estate investing also requires occasional maintenance. Currently, we invest in a couple of rental properties and earn about $500 profit from each per month. You can read more about my rental properties at MoneySmartLife.com: How and Why I Became a Landlord.
We usually think of Craigslist as a place to buy and trade random stuff, but Craigslist can actually be a great opportunity to sell your services online to an active and engaged audience. Simply check the “jobs” section and “gigs” section for specific cities and see if anything matches your skills. The great thing about Craigslist is that it is one of the highest converting traffic sources on the internet (think active buyers) which can mean more opportunities at higher pay.

The idea behind cashback is simple: you get rewarded for purchasing or using products you plan to buy anyway. Cashback sites pay you when you click through them, go to retailers, and spend. For example, check out eBates.com - There are over 2,000 stores to choose from including Walmart, Target, Sears, Calvin Klien, and others. You also get a $10 gift card after your first $25 purchase. Sign up is free. (If you encounter a cashback site where it’s not, avoid it.
Another benefit, which many online entrepreneurs do not even consider, is that you don’t need to create the whole product before launching it. You only need to create a small portion of your actual content, and complete it only after you get your first member during his membership - that means you get paid IN ADVANCE of actually creating your site content. It also means that you can modify your content based on LIVE feedback from paying customers. More importantly, this is a great way to VALIDATE your site and ensure you create a product based on what customers want, not just what you think they want.
Make sure your tenants understand that the rent is due in your PO box by a certain day. I recommend using a post office box to avoid tenants coming to your home. Understand how much you can legally charge for a late payment, usually a trivial amount like $15 after a grace period. Explain to new tenants your policy on the eviction process, i.e. when do you start the process when rent is late.
Bryan added: "If you make your choices based on, not 'how can I get money for free?' but on, 'What challenge can I put in front of my face that's going to have me step up to be the kind of person I'd rather be?' you're going to start to forget about wanting passive income, and you're going to start to focus on what purpose you truly want to create the world."

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.
According to Uncle Sam, you need to be "materially involved" in an enterprise to earn active income. With passive income, it's just the opposite, as the IRS deems you to be earning passive income if you're not materially involved with a profit-making enterprise. By and large, expect income to be taxable if you are engaged in a passive income enterprise. You will need to report earnings to the IRS. 

One of the best ways to build wealth is to get a handle on your finances by signing up with Personal Capital. They are a free online platform which aggregates all your financial accounts on their Dashboard so you can see where you can optimize. Before Personal Capital, I had to log into eight different systems to track 28 different accounts (brokerage, multiple banks, 401K, etc) to track my finances. Now, I can just log into Personal Capital to see how my stock accounts are doing, how my net worth is progressing, and where my spending is going.
If you’ve ever thought to yourself, “I wish there was a product that did this,” then invent it! Create a product, medical or otherwise, and sell it as a company or get royalties for it. It’s not impossible to figure out, I have many friends who have taken a concept to market. Don’t overlook an invention as a fantastic means of attaining passive income.
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