Take a look at your environment, inside, or outside. Focus your attention on one object or one aspect. Something specific. Try looking at it from a new angle, or thinking about it from a different perspective.
Make brief notes; whatever comes into your mind. Don’t censor, just write what comes.
Sit and read your notes then write something for 15 minutes. Don’t censor or edit, just let the writing come and see where it goes.
Please feel free to share your writing or your experience of this exercise in the comments section.