Ekphrasis is from Greek meaning the description of a work of art as a rhetorical device. That's actually pretty straight forward, but another way to look at it, is it's highfalutin fan fiction, usually about paintings or pieces of music, but it can be about virtually anything. Look at or listen to the following piece of art and write a piece of prose or poetry that is inspired by some aspect of it.
Listen to "Up on Melancholy Tree" by the Gorillaz
Grab onto something. Listen avidly, look closely. Find something to love and grow that love in your mind until you can't help but let it burst from you. Express it in words. This is the best part of existence.
Every exercise is an adventure in tiny loves. Discovery and the infatuation for what makes it it is the lifeblood of creativity.