Great list! I have another to consider that I personally have 35+ years experience providing. Clean up litter outside commercial properties on foot using inexpensive hand tools. It’s almost as easy to do as going for a walk! I started doing this as a side gig in 1981 and soon grew it into a profitable full-time business. I share my experience in my book, Cleanlots.
There are several ways to make money from your car such as taxiing people, renting your car, or advertising businesses. Run the numbers before using your car to make money, especially if you're driving more than usual because it might cost more than you earn to use your car as a money-maker. Factor in depreciation, wear and tear, and gas expenses when you decide if driving is a cost-effective way to make extra money.
Or, if you’d prefer more something more editorial and less salesy, you can find that, too. Media companies (including Entrepreneur) offer digital writing and editing positions for the digital publication, which essentially can be accomplished from anywhere in the world -- as long as you have an internet connection. In fact, we have some writers at Entrepreneur who work from Paris or their home offices instead of the office in New York City.
For those with a large Twitter following, you can make money from your Tweets alone with Sponsored Tweets. You could be paid for sharing a business’s information, recommending restaurants or hotels, or tweeting pictures of you using or wearing products. As with all sponsored posts on social media, businesses will only be prepared to pay you to Tweet if you have a large following that you can influence. So work hard on building up a loyal fan base.
If you have a background in marketing and a passion for a particular niche, then organizing a virtual event may be just up your street. A virtual event could span across a day or longer. Individual live sessions would be run by experts in the field. And conference features would include live question and answer sessions, forums, and plenty of free giveaways. Visitors to the virtual event would pay to attend, so the more effective your promotion of the event the more money you would make.