Pleiades poems were among the first of the forms I learned, way way back when. They are still among my favourite to work with. Pleiades are seven line poems, with a single word title. Each of the seven lines must start with the same letter as the title. They lend themselves very well to playing with alliteration.
Slip the chains of mortal coil,
set free the mind to wander
softly down ancient corridors or
soar free through blue sky,
savoring the freedom of
subconscious sallies as
slumber claims the waking mind.
Come play! Put a pleiades of your own in the comments! I’d love to see what you come up with.