One cannot leaf though a writer's magazine or writing book without running across tips to overcome or prevent writer's block. I always presume that the tips are meant for amateurs; none of the professional writers I know believe in writer's block.
Nevertheless, I do keep track of what other people do to break blocks when they occur. The other day on Facebook, it was knitting and spinning around in circles.
Personally, when I am not sure what to write for the next paragraph, I resort to washing the block away: loading the dishwasher, the washing machine, sorting though the mess in my office, and taking showers.
Of course, I am not sure if anyone understood this the other day at the writer's meeting for the student newspaper. I got some strange looks when I said that a lot of my writing occurred in the shower. I wonder how they would have felt about knitting or spinning in a circle.