When you have knitted your last row you can go the the other side of the scarf (away from the working wool) and pick it up with a crochet hook, pull it through next loop/stitch, continue to end - a no-wool cast-off!
Confessions… um… I buy too much wool and hoard it - anyone else do that?
Well, when I’m looking at beautiful wool online - really beautiful stuff - I sometimes actually sigh (or even make the kind of ‘ah’ noise you’d expect from a man watching really hot porn. Hence the name, I suppose).
And I wind my balls repeatedly, saying it’s to get the tension right, but also because I love winding.
Worst of all, I buy beautiful novelty/patterned/self-striping wool even though I wouldn’t use them in anything with a complicated stitch pattern, just stocking, but I hate stocking and hardly ever use a simple knitting pattern that mostly uses it.