First thing when I got The Shape of Knitting by Lynne Barr I got out some leftover yarn and knit this amazing little headband:
Of course, it wasn't quite as simple as that, because of the three-dimensional twisted cable wave thing going on. I had to start it maybe three times, but then I got it, and it was a very quick knit after I understood what was going on.
I think maybe the pattern could have benefited from a diagram, or another marker on the right side of the headband to keep things straight in the instructions. But it's ultimately such a cool little project that I'm glad I stuck with it.