It's always worth it. Especially when the project is actually started and finished in two days, even with the interruptions. Plus, when will I learn? Doing one creative thing doesn't suck the finite resources away from another endeavor. Creativity fuels and builds on itself. Like my 401k (or so they SWORE to me when I first started working...), it multiplies exponentially the more I use it, especially when it's diversified!