[LoveBugAngel]

I prefer doing the entire blanket whole and avoiding the seaming.

Via intarsia. CO x stitches of each color, one after the other. Work Y rows to form a square. Cut yarns and rearrange color order. Reattach yarns on next row. Work Y rows. Repeat. To get something like this.
http://www.ravelry.com/patterns/libr...threads-alpaca

Or this, which requires "picking up stitches" after turning each corner, but no seperate seaming.
http://www.yarnandstitcheryalcove.co...%20Blanket.pdf


Or, try enterlac.
http://www.nikkiinstitches.com/wp-co...et-Pattern.pdf

Or, a large basketweave pattern.
http://www.lionbrand.com/patterns/50073AD.html

They are all fantastic, they are all what I had in mind when I thought of knitting "squares"