People who fish our local lake spend a lot of time standing on fishing platforms like this one. It demands a lot of patience, an ability to be still and silent, to slow down, waiting for that perfect moment, for the fish to bite.
Writing demands the same quality, an ability to be still, to day dream, to wait and let ideas surface.
Why not spend a little while just being still, letting your mind wander? Then after a time of stillness, try some free writing. Maybe write for twenty minutes, without over thinking or judging what you write. Pay no attention to grammar or spelling. This writing is just for you. Try writing long hand with pen and paper. Just keep writing. Cast your net wide and see what you capture.