I just realized that you can measure how much yarn you are using per knit row by measuring your working yarn and placing a marker (bead, tied on piece of yarn, whatevs…) at a determined length. If you get to the marker before the row is done, just measure a little bit more, and place the marker a little bit further down the working end of the yarn.
I was just about finished with one ball of yarn and needed to end on a purl row. I was about to cut and ditch the excess, but I decided to measure how much I was using. I actually worked 6 rows more than I thought I could.
I just maximized the ball, and minimized the waste.
I feel pretty smart right now… Pretty damn smart.