One of our favourite exercises is the list poem. Simply pick a topic (like "love" or "shame" or "going out out") and then write a list poem, using "It is..." as the beginning of each sentence.
Rules: every line starts with "It is..."; max. 12 lines - make it as visual and vibrant as you can!
Example (chosen topic "Passion for the Planet"):
Passion for the Planet
It is stopping to pick up litter from the pavement
It is waving a placard in protest
It is feeding the pigeons in Trafalgar Square
It is cycling to work even when you’re hungover
It is veganuary and vegbruary and
It is Marching onwards
It is going paperless
It is creating a shrine in your room to Gaia