Did you know that today is the infamous Ides of March?
Write a poem that's a warning to someone, or some people, about something you believe is dangerous or is going to happen. Free write around the word 'Beware', either in a linear fashion, or by making a 'bubble map' or 'mind map'. The latter can help us break free of ordered or logical thinking and allow the mind to wander more freely or imaginatively.
Your 'warning' can be based in reality or fantasy. It can have public or private significance. It can be serious or light-hearted. List topics that people might need warning about e.g. deep water, words uttered in anger, sugar.
If you're still feeling uninspired after all this free-writing, try one of the following words or phrases as a kick-start:
This is what can happen in the dark
Beware of snakes
You will find a poem, something that matters to you, if you keep writing, if you go deep enough.