Starting your session with a bit of Mozart will put your brain into high-gear. Play the notes that were suppressed.
Of course, too many rules can often kill games and creativity for kids and adults. He would then return to the music and have a solution for getting past the challenge.
Well, as you know, maintaining your creative output can be tough. The great producer Brian Eno and his painter friend Peter Schmidt came up with a series of randomized cards called Oblique Strategies.
The idea is not to judge. But it really works! Set a time limit.