Etsy: While Etsy's popularity has declined recently, it's still a great resource for selling handmade items online. No need for complex ecommerce sites or merchant accounts or any sort of automation. The company takes a commission of every sale and charges a small listing fee per item. But many still use Etsy as their primary source of income. The best part is that you can also sell digital products on here such as poster designs. 
Blogging can be a great side hustle. Though the income may not be steady and it can take awhile to get rolling, there are a few steps you can take to ensure success. I would recommend that before you start thinking about money, you start thinking about the topics you are truly passionate about. What can you talk about and learn about for days? That’s exactly what you’ll be doing for years to come, after all. Get some more tips on starting a blog here: How to Start a Blog and Make Money in 7 Steps 

If you have a propensity for writing and you can slay with your prose, consider writing an ebook. While the market has certainly become saturated as of late, books that help teach people about a technical topic still sell extremely well. This is a great source of passive income but does require a large amount of effort at the outset before any money is generated.
According to Statistica, 76% of the U.S. population has at least one social networking profile and by 2020 the number of worldwide users of social media is expected to reach 2.95 billion (650 million of these from China alone). Of the social media platforms, Facebook is by far the most dominant - as of the end of the second quarter of 2018 Facebook had approximately 2.23 billion active users worldwide (Statistica). Mobile devices have become the dominant platform for Facebook usage - 68% of time spent on Facebook originates from mobile devices.

Look through your attic and closets. It's time for a purge. Selling on eBay is an easy way for you to clear up the clutter in your home while making money. But you can also look at eBay as an income opportunity through its many business models. Besides selling your own stuff, you can browse garage sales to find inventory or even open your own eBay consignment business to sell other people's belongings while earning a cut.
Know how much content to post. This advice goes both ways. On the one hand, you don’t want to shove unwanted content in someone’s face and turn them away from your platform. But if you don’t post enough, you could be missing out on potential opportunities. So find a good schedule that works for your business -- and for each platform you use -- and stick to it.
Comfort. Perhaps the biggest thing that you’ll need to do in order to create a successful B&B is to make sure that your guests are as comfortable as they can be. Remember, they’re paying more for the experience of being comfortable away from home. As a trial, spend a night in the room in your house that you intend to rent and view things from a guest’s point of view. Is the temperature comfortable? Is the bath in the room, or at least a comfortable distance away while still being private? Is the bed soft and inviting? The pillows? Is the bedroom interior design, including colors, soothing? Can you hear household noises, or do you feel that you’re in a world of your own? All of these are important questions to ask yourself, but the answers will determine whether or not your guests recommend your place, or come back for another stay. Think about all the minor inconveniences and discomforts that you’ve just gotten used to over the years, and remember that a paying guest might not tolerate those problems for a night. You may need to spend a little money to fix these issues.
In April 2008 the State of New York inserted an item in the state budget asserting sales tax jurisdiction over Amazon.com sales to residents of New York, based on the existence of affiliate links from New York–based websites to Amazon.[45] The state asserts that even one such affiliate constitutes Amazon having a business presence in the state, and is sufficient to allow New York to tax all Amazon sales to state residents. Amazon challenged the amendment and lost at the trial level in January 2009. The case is currently making its way through the New York appeals courts.
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