Once you create a side-project, and finish it—you absolutely must finish it—you realize that these things aren’t that hard. Most importantly, these projects are incredibly fun. That’s why I don’t work at a big company. I want the time to do my own stuff—even if it isn’t necessarily that profitable. Side-projects are intoxicating beyond compare. No other act can fill you with as much energy and joy, as making your own things will.
So, don’t wait. A mediocre side-project today is better than an amazing one that you never get to. Go to your kitchen table—right now—clear off the mess, and plan it out.