Having all of the things I might use handy helps my creative flow. Once I decide on a theme (Steampunk in this case) I print out the digitals I'd like to use and go through my stash to find things that will compliment it. Plastic display folders keep digitals in perfect condition and are so easy to flick through. Cello bags are good for organising ephemera because you can see everything at a glance. Here's a video showing my process for getting organised.