Since I still have 5 kitty litter pails full of leftover yarn balls (and that's just counting the acrylic worsted), I'm making another scrappy spiral blanket. This time I decided to get tricky and start with a rectangle. If you Google "rectangular granny square" you will find a number of ways to start a granny rectangle. The one I chose was this: http://iamtotallyobsessedwithyarn.blogspot.com/2006/01/granny-square-pattern-with-pictures.html
The center doesn't have as obvious a line down the middle, and there were lots of pictures to help me adapt to the spiral start.
This is what I have so far. Except for the shape it will look pretty much the same as the first one. The only other change is in the way I'm counting how many balls of yarn are used. This lot in general is a little bigger than the last lot, and I didn't want multiple rows of the same color, especially in the beginning when the rows are relatively short. So I decided it was okay to cut the yarn and return the ball to the pail, to use up the rest of it later. This means counting snipped yarn tails won't work as a way to count the number of balls used. So I decided to just count how many balls were in the pail; I started with 60. I can add or subtract from here as needed.
Plans for #3 are in the works. Stay tuned.