Whenever I’m feeling uninspired in my writing, I take a spin on the old Wikipedia “random article” roulette and find two different concepts and try to write to the thread between them.
For instance, Lord Tennyson’s most famous bit of poetry, “’Tis better to have loved and lost/Than never to have loved at all,” and Marlon Brando’s “I could’ve been a contender” monologue in On the Waterfront both talk about being on top of the world for a brief moment before watching that potential evaporate. They discuss the empty feeling of loss and how to reconcile with that.