For 2019, I gave myself an achievable goal: make at least 1€ of revenue with a side-project. We are the 31st of December and I'm very happy to have crushed this objective with Stream Maker!
For 2020, I have features to add to Stream Maker but I'm also working on another side-project ( https://webdocs.app ) that I hope I'll be able to monetize as well, let's hope it'll be as successful as the first one!