Almost all of these ideas require starting a personal blog or website. But the great thing about that is that it's incredibly cheap to do. We recommend using Bluehost to get started. You get a free domain name and hosting starts at just $2.95 per month - a deal that you won't find many other places online! You can afford that to start building a passive income stream.
stREITwise offers a hybrid investment between traditional REIT fund investing and the new crowdfunding. The fund is like a real estate investment trust in that it holds a collection of properties but more like crowdfunding in its management. The fund has paid a 10% annualized return since inception and is a great way to diversify your real estate exposure.
- is a content community for writers. Members (referred to as "Hubbers") are given their own sub-domain, where they can post content rich articles (known as Hubs). As a Hubber, you earn revenue primarily from Google AdSense (you need your own Adsense account) and other advertising vehicles such as, Kontera, and the eBay and Amazon Affiliate programs. There is a 60:40 revenue split and it’s achieved by alternating the code used in advertisements: Your code will be displayed 60% of the time, and HubPages' code 40%. Same as Squidoo, traffic dropped heavily due to Google's changes but the site is still wildly popular. Currently it’s one of the 500 most visited US sites on the Internet. 

One of the most appealing options, particularly for millennials, would be #12 on your list (create a Blog/Youtube channel). The videos can be about anything that interests you, from your daily makeup routine (with affiliate links to the products you use), recipes (what you eat each day) or as you mention, instructional videos (again with affiliate links to the products you use). Once you gain a large following and viewership, you can earn via Adsense on YouTube.
* I use Personal Capital to track all my finances in one place. It’s much easier to use their free software to follow 28 accounts on one platform than to log into various accounts to check my balances. They’ve also got great tools for x-raying your portfolio for excessive fees, recommending a more optimized asset allocation, and planning for retirement with their Retirement Planner.