I think boredom is also very powerful creatively: just sitting by yourself and giving your mind an opportunity to wander where it will.
Reminds me of Raymond Chandler's productivity tip: during his 4 hours of writing time, he allowed himself to either write or do nothing. So he was either working, or he got bored and started working.
I agree too, i see that when i am bored i create more and i want to do more creative stuff. In my opinion boredm is really useful <3