I've discovered a word that, if I repeat it a few times and let it echo around in me, can sometimes prevent me from writing a poem: cenotaph. I barely know what the word means - some sort of monument for the dead - but the word reminds me of some of the poetry I read when I was younger, mostly bad stuff from the mid to late 20th century. It's the type word that only someone who believes themselves a poet would try to use poetically.
This is my incantation (there's another!).