I was sorting through my yarn basket yesterday and decided to use up all of the scraps and partial skeins I found tangled at the bottom. I have a bunch of beautiful, bright colors that are mostly worsted weight cottons - all of them really soft and lovely. My idea was to begin crocheting a granny square, adding in each new color when the old one runs out - I'm not going to pay attention to making complete rows with each color, just use it up and start with the next one.
I'll keep adding to the granny square with all of my current and future scraps (and maybe a full skein or two) until it is enormous - possibly large enough to cover my bed. At least big enough to fold over the back of the couch for a pop of insane rainbow color : )