Submit all posts to relevant blog carnivals. Also, socially bookmark every post on as many places as you have time to do so. Place some Adsense on it and maybe a few affiliate products. Then leave it. It might take a few months to get your $100, but it will still be as a result of one day’s work. If this works well for you then there is nothing to stop you from keep creating one of these every day.
Become a dog walker if you live in an area where they are in demand. You can walk dogs for people who own dogs but who are too busy to walk them. However, this can be a demanding job, especially if you end up walking a few dogs at once or if you are walking dogs throughout the day, so ensure that you have the physical stamina for this type of job.