I have some creativity tools I want to share. They may be relevant most to narrative arts, fiction writing specifically, but I think they could be adapted for other creative processes.
1. Rory's Story Cubes have images on their six sides. Roll the dice and create a story based on those dice. I have a generic set, but thematic Story Cubes exist as well. These include Doctor Who, Batman, space, and animal cubes.
I have used them when I am completely stuck. They are also a way to start a story when I
need one but have no ideas.
Below is an example of a paragraph of story I generated. I forced myself to use the images from all nine dice.
The images were a bridge, a falling star, a flame, a fish, one die, a cane, a rainbow, a dialogue bubble, and the Earth: