With a passive income stream, it’s not only about financial freedom. Instead, you have created something that matters. Yes, you will have to step out of your comfort zone in the beginning and take a risk. The most important aspect of obtaining passive income is a positive mindset. If you truly feel you can accomplish your dream, believe me, you can. The committed positive mindset will help you get there and reach the potential you know you’re capable of.

Earn residual income through referring consumers to an established product or service. Use your site to advertise to the company or companies you are interested in providing referrals for. Referral efforts can be coupled with informative e-books, seminars, or articles about the product or service. Build your newsletter lists in the same manner, the difference being that you are directing consumers to a third-party business.
Another way to generate passive income is to invest and be a silent partner in a business. This is very risky, but with risk comes the potential for high returns. For example, several years ago both Lyft and Uber were looking for private investors to invest in their companies. Today, they are worth billions - but you as an investor would only reap that benefit if they go public via an IPO, or get acquired. So, it's risky.
One of the things I'm surprised your article doesn't mention is the tax advantages of this type of investment. The depreciation and rehab costs (purchasing distressed properties) can be huge deductions to ones income taxes, which none of the others have. Then, along with the appreciation of real estate, this passive income investment outperforms the notion of maxing out my 401k as well.
First off, let’s address what is understood to be linear income. Employees, independent contractors, and self-employed business owners make up the linear income bracket. Linear income earners are only paid for the specific time expended, or paid directly proportional to the number of hours invested in their job. Linear income earners must be physically present or “clocked in” to get their paycheck.
This may be a method that is unusual. Drive traffic to your lens the same as you would your blog. Link to your lens on social media platforms, like Twitter. The more people that know about the lens, the more that are apt to visit and purchase. The lens can also be used to promote products on e-bay or CafePress. Write a short description of the product and its unique uses and sell away.
Whatever you do, there is someone who wants to know how to do it too. I think selling your knowledge is key in a world of growing entrepreneurs. We need to be able to do it all, and online education is growing and expanding every day with new students waiting to learn what you know… so teach them and earn money while doing it through an online course on a site like Udemy!

I have only dabbled in drop-shipping before when I had an eCommerce platform 6 years ago or so. I think it is something that you could do on the side, but you would want to do in depth research on the industry you want to get into before setting up shop. It may be a little less passive up front, but over time you could take your hands off the wheel.
Many people talk about passive income and create the impression that you never have to do anything to keep that income going. The truth is that you will normally have to keep your eye on things if you want it to run smoothly. For example Richard Branson doesn’t run any of the 400+ companies he started but he goes over the numbers each day to make sure they’re performing well and calls the CEO if there are any problems.