I collect little random objects (wine corks, plastic binding from notebooks, scraps of ribbon, etc.) and put them in a box so that I can make things with them. Usually, I have no idea what I'll make when I put them in the box, but on one random day, I have an epiphany and make something awesome. Sometimes, I have plans, like my wine cork mobile that I will make as soon as my collection gets larger (I can count on my mom for constantly providing me with them.
Remember those swirly colored pencils from the other day? They were wonderful in making my Polaroid Shrinky Dink!