If you’re serious about making money selling things online, it’s pretty much impossible to not recommend Shopify. The platform gives you everything you need to get your online store up and running in less than a day including a custom domain, beautiful templates (so you don’t need design skills), secure payment options, and they can even take care of marketing and shipping for you. Whether you’re promoting your own products, designs, or curating other products for people in your niche, Shopify is the best option for powering your online store. 

Considering that you have a finite amount of time, passive income should make up a large part of your work. And if you're serious about generating any semblance of income online, then passive income should be one of your sole goals and ambitions. Why? Simply this. Wouldn't you prefer to do the work one time and get paid repeatedly as opposed to relying on your time to generate that income?
“I dreamed of creating a community that empowered people and gave them the tools to achieve their dreams. At the time, I felt unfulfilled and unhappy with my job and life, so TNC rapidly became my after-work obsession...I am crazy about helping others find that same “something” in their lives. Whether it be sharing all of my lessons learned so you can grow the biz of your dreams or reminding you why you’re ready, even when you think you’re not, I hope TNC unlocks something BIG deep inside you.”
There are loads of resources for making money online as an affiliate. You could source products from ClickBank, Commission Junction, Rakuten Marketing, Share-a-Sale, Impact Radius and many others. Plus, many of the larger companies have their own affiliate programs as well. Do your due diligence and find the right company with a relevant product or service to your audience that you can sell as an affiliate.
Fiverr: Israeli-based Fivver was started in 2010 by Shal Wininger and Micha Kaufam. It's a great resource for selling just about any service online. You can offer gigs as low as $5 but also get paid much more for upgrades and add-ons. There are plenty of providers earning 6 figures on Fiverr so it's definitely a worthwhile cause for generating a healthy income. Just ensure that you provide some serious value. 
Make sure you have some sort of money maker on your website before you start promoting it. You could promote an affiliate product related to your site's topic, or you could use Google Adsense. Your goal is to get your site to make the most money possible, so if you have lots of ways to make money on your site, then you will most likely make lots of money.
Personally, my experience with Amazon thus far has been good - a few of my short eBooks generate steady passive income on weekly basis with zero additional effort from my side. One thing to note though - Amazon pays 70% royalty on each eBook sold only if your eBook is priced between $2.99 to $9.99. Less than or higher than that pricing structure, the royalty decreases to 35%.of your book’s listed price.
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 Fundrise. They are my favorite real estate crowdsourcing company founded in 2012 and based in Washington DC. They are pioneers in the eREIT product offering and they’re raising an Opportunity Fund to take advantage of new tax favorable laws.

This is NOT an Internet Marketing “magic button”. This isn’t some software you install and merely click 3 buttons to make money. This is a fully-functioning, real internet business that can generate a sustainable passive income for you. The reason why it becomes easier for you is because we’re doing all of the work FOR YOU, mainly so that you can just focus on the one task, which is driving the traffic. You’re leveraging on my marketing system.
Investing in coins and collectibles: Buffalo nickels and Spiderman comic books are good examples of coins and collectibles that can rise in value, and thus offer opportunity for passive income investors. You'll need to get up to speed on the value of any coin or collectible under consideration, but once you do so, you're on the way to price appreciation on a commodity you'll be paying a lower price to buy, and will garner a higher price when you sell.

Today, if you're at all serious about succeeding in any endeavor, whether online or offline, you have to deliver enormous amounts of value. Yes, you have to do the most amount of work for the least initial return. This is especially true online. Why? Because it takes time to build authority and create an audience, two primary ingredients necessary to succeed in the wonderful world of commerce on the web.

It is very important to understand that contacting a “professional” to learn how to do this only results in them trying to sell me crap properties (whether high end or low end). I’ve tried contacting realtors out of state, and they attempt to sell me crap or someone else’s problem. No one has a vested interest in actually helping someone or teaching them about how to get an out of state rental. very frustrating. I could go out tomorrow and buy a rental in my city, but that is the last place I want to own one. Anyone? Are there an real people on here?
Though it can take a while to build up enough cash to put a 20% down payment on an investment property (the typical lender minimum), they can snowball fairly quickly. The key here is to correctly project income and expenses in order to calculate cash flow (the free cash you can put in your pocket after all associated property expenses have been paid). However you have to be sure to include the cost of a property manager in your calculations unless you want to manage the property yourself. Even with a property manager, you may be required to make large repair decisions every now and then – so while this is not a 100% passive activity, you are not directly trading your time for money like traditional employment.
As with most “awesomely easy way to make a ton of money online” products, the hype is incredible. If the sales pages were actually true, you would be sipping margaritas from some tropical island, without a care in the world, as quickly as tomorrow, and you wouldn’t even have to lift a finger. I don’t know how this works…maybe you just teleport or something magical like that!