Here’s a good article on a series of studies, that examined the importance of specific mindfulness skills in the creative process. https://www.mindful.org/does-meditation-boost-creativity/
You can also try playing this music in the background while you create. It really seems to get things flowing more freely for me!
I’ve been using Kelly Howell’s Brain Sync meditations off and on for years now.
According to the Brain Sync website, the binaural beats they use in their recordings help to “balance right and left hemispheres to achieve remarkable mental states. Precision engineered sound waves tune your brain to ideal states of consciousness for meditation, learning, creativity, healing, sleep, goal achievement and behavior modification.”
During the first few months of testing this stuff out, I used the Secret Universal Mind meditation nightly. After some time, I began to hear myself thinking in ways just like Kelly Howell! For the lack of effort, I thought the result was very cool and it definitely re-patterned my thinking for the better.