I don't know, I throw everything but the kitchen sink on to my layout. I resize, move it around, under, over until it "looks" good. I always try to stick with odd number of things and try not to make it symmetrical or looking like the one side is the same as the other side.
See...everything but the kitchen sink
Good thread. I'm going to go through and see everyone's method of clustering to learn a few new things!
