If you don’t mind being sleep-deprived then this trick might help.
Salvador Dali, the Spanish surrealist painter, famous for paintings such as the Melting Clock and the Burning Giraffe, apparently sought inspiration for his hallucinogenic style on the intercept between dreams and reality.
Wanting to tap into the imagery of the unconscious imagination (and obviously needing to be conscious to paint the image) he would sleep holding a metal key in his hand hovering over a tin plate. When he fell asleep the key would fall from his hand and onto the plate, the noise waking him up.
At that very point (where the mind was still half asleep) he would capture the image of what he saw in his mind and incorporate that into his painting.
Alternatively, I hear Netflix is good too.