I am currently making a leaders and enders quilt using 3.5 inch square scraps. I'm going to do a what I think is called a disappearing 9 patch. I've never really done scrappy so in order to keep myself from trying to control it I tossed all my squares into a large brown paper bag and I just take 2 out and sew them together. Only time I low myself to not is if they are the same. Once I get a bunch of 2's done I add a third square by pulling from the bag. Once I get enough sets of 3 done I'll toss all of them into the bag to sew them together.
Im hoping once it's all said and done they will have all played well together and it's something I like.