I think I've found my own version of Zentangle -- a creative process that puts me into a meditative state of mind. It started with the backgrounds I made for my "Psychedelic Dancers" series. I realized I didn't have to start with a collage -- I could make an entire drawing with colored pencils.
I made a list of all the "hippie talk" 70s slang I could think of and then started drawing. Choosing the color combinations was part of the fun (also an excuse to buy more Prismacolor pencils!)