Before iPhones, I used to wear my backpack wherever I biked in Boston because my brain would never stop, and I wanted to have everything necessary (laptop, notebook, and camera) to quickly capture these curiosities before their vividness because as foggy as a forgotten dream.
Not every idea was useful. Most ended up in the trash can. But many did serve as a substrate for something more. Maybe a poem. Maybe a hobby. Maybe some new creative endeavor.