My plan was to use all four balls of yarn. However, I was heartily sick of it, about 100 stitches short of finishing the straps as the pattern required. Therefore, I had to crack the fourth ball, and used a few meters, just to make it worthwhile. The remainder will become a potholder, or something.
And since my TV watching wasn't done for the night, I cast on a pair of mitts.
I hate knitting mitts. Well, that's not true. I hate knitting thumbs. Thumbs are so fiddly. Therefore, I am going to avoid the fiddliness by making the mitts about twice the usual size and then felting them.
This is my master plan, and also is a crucial step in my unofficial "Let's pretend it's not Christmas" campaign.