All good suggestions. One I did myself was to pick out a block that seemed my speed, enlarged it, and picked out fabrics to match. It uses two colors and I picked six that go together, then made the block in mirror images color wise in the three color ways.
OK, so I'm only starting on the second color set, finished block size 18". Learning as I go, but it did give me the excuse to get the 20 1/2" square ruler (with coupon, at JoAnn's.) :-)