I collect a small amount of imagery. Nothing bonkers, not a true collection, but a selection of things I like, which I tear out, print out, keep.
I used this library a lot last year when I was pattern designing. It felt very satisfying to be churning the images in my brain, making them useful, my hand / track pad creating something new with them as the inspo.
I loved this image of a building block. Last year I took it straight into Photoshop and repeated it, (almost making a pattern already) and today I finally FINALLY sketched from it.