Websites like Airbnb allow you to enlist your unused property, partially or wholly, to be rented out by people looking for long or short-term stays. However, this requires a tiny bit of initial investment as you would need to take care of the cleaning and maintenance and furnish the place with essential commodities.
If you are interested in working as a mystery shopper, you can apply online through IntelliShop and Sinclair Customer Metrics.
With the introduction of the collaboration between Amazon and Kindle, many creative writers have found a new way of making money: to publish their ebooks on Kindle. So if you have a story in mind, all you need to do is write up your book and let Amazon take care of the rest.
Websites like eBay allow you to make your product listings and let people buy them off of you. So the next time you see a gift card just lying around, get on the computer and get something out of it