Dreams are undirected mash-ups of our thoughts and experiences, mash-ups that sometimes produce ideas worth exploring. But dreams are also fleeting, almost always forgotten after waking. Thomas Edison used to take naps sitting in a comfortable chair, with metal pie plates sitting on the floor on either side, while holding marbles in his hands. When he drifted into a sleep deep enough to relax his hands, the racket of marbles hitting metal would wake him up so he could write down his dream ideas.
I do that with the snooze button, or at least that’s my excuse.
Keep a notebook by the bed, and by the comfortable chair, and by the tub, everywhere you like to dream, or daydream.