Those random pieces of plywood that had a bunch of stuff lasercut out of the middle? Save them. You never know when they might come in handy.
For example: the other day I needed to make a simple camera mount for taking closeup pictures. I could have 3D-printed a base, or used a brand-new piece of scrap lumber, but instead I had a couple of offcuts from the makerbot cupcake kit I got on clearance 5 years ago. (Yep, it really is 5 years.) A bolt and a washer from the scrap drawer — I happen to know the washer was most recently part of the 7-year-old’s previous bed — and presto.
I think it’s kinda pretty.