If you are using a free blog hosting service instead of your own domain name, you must provide high quality content with a limited number of relevant links or risk being shut down. If you are only interested in writing short, quick product reviews in order to earn money, you will need to host your own blog. Be warned that low-content, high-link blogs are a less reliable, though lower effort, way to earn money.
Very useful, applicable and dare I say inspiring post, Jon! I feel I’m ready to systematically implement all of your solutions (and similar ones offered by others) but I often wonder if I would have more success starting a new blog from scratch, than trying to up the ante with my existing blog. It would be nice to have time for both! Great post though, I will be bookmarking (and sharing, cuz you asked) this one.