My current plan is to make a bite-sized game comparable to this at least once a month (it'd be a little stressful to force myself to come up with something fresh every single week) and maybe just experiment with small projects with no plans for completion in between. I also have a long-term project that I'm expecting will take ~2 years, and honestly, sometimes I feel like I've run out of ideas. Taking time away from my main project to work on these little "distractions" actually ends up helping with my main work. I spend less time idly waiting around for a good idea or solution to a persisting problem, and more time solving new, smaller problems that can later be applied somewhere else. Hell, I actually find myself actively switching between tasks every 10 minutes and ending up even more productive than I would be focusing on just one project. Also, I had no real experience with Unity before this game, and just taking a couple of days to force myself to learn it opened some doors for future big projects.
In short, work on tiny projects whenever you find yourself doing nothing. You might end up more productive or just happier knowing what you're capable of.