I've decided that the easiest way to keep track of my yarn usage would be by weight. Many of my yarns are odd balls, or old, or unlabelled, and many of my projects use multiple yarns. Trying to figure the yardage for these yarns and projects would be too much work. But I can always weigh a project!
Starting right after Christmas, here's what I've used up:
Cream tuck scarf 50gr (estimate)
Rose tuck scarf 40gr (estimate)
Green tuck scarf 75gr (estimate)
"Blankie" skirt 279gr
felted slippers 129gr (after felting...my pattern says 117gr for the last pair)
sock monkey 125gr (estimate; he's already stuffed)
Marble Scarf 54gr
Meg's cowl 38gr
Bonnie mitts and scarf 156gr (small amount was Classic Wool; about 6gr)
donated sock yarn 300gr
Yarn that Came In the House:
Green Classic Wool 77gr/$2
James Brett Marble 54gr/$2
2 balls Black Classic Wool 200gr/$10
Brown Fisherman Wool 227gr/$11.24
Brown Handicrafter 100gr/$2
Total: 658gr/$30.78 (inc HST, 13%).
So, I've used up about twice as much yarn as what I've bought so far! That's awesome!