Just FYI, y'all, I have discovered that you can knit with cheap yarn or cheap needles, but not both at once.
( The key to knitting cheap cotton )Also,
the Single Crochet Castoff (scroll down, there's video) has permanently fixed my castoff problems; I always had to cast off with a needle about 4 sizes bigger to make sure it wasn't too tight. And then it was too loose.
Finally, for those in countries with Giant Grocery stores, I have become a sudden devotee of their reusable grocery bags. I know I have a bazillion totes (most saying "Malice Domestic" on them) but the Giant bags have a really good capacity, stand on their own, and only cost a buck. IOW, they're excellent project bags.