Sleep deprivation can easily bring on more creativity too. You should definitely look into lucid dreaming if you are ever looking for other avenues of inspiration. Once in a lucid dream, I decided to look at a piece of art I was working on in waking life to see what the end result could look like. I expected it to look the same in the dream, but it was so much more beautiful than I ever could have imagined in waking life. The final piece never ended up looking exactly like the one from the dream (I'm not that talented!) but I integrated parts of the art from the lucid dream into the real one. That will always be one of my more memorable lucid dreams.