I find writing to be an amazingly creative process. I can be watching the most tedious clip in the world which has not one event for me to hang my hat up on and deconstruct. As a last resort I'll start writing about it. Writing abut how nothing is happening and what that 'nothing' is. Then something extraordinary always happens. A kind of creative floodgate opens and I keep writing and capturing. Before I know it, I have three paragraphs of thoughts to distill.
Collaborations is also very powerful when it comes to creative output. But not always practical.
Here is a helpful article I found somewhere on how to unlock or unblock your creative juices. A must read.