Ok, so in the spirit of being honest with myself, I have added all my acyrlic and other chain store yarn to my stash on Ravelry. There was a huge bin of this stuff underneath my bed, and now it is all out in the open. It is not new stash, but it has seriously upped my totals.
Bernat Softee Baby Yarn: 4,322.6 yards
Worsted Weight Cotton: 520 yards
Worsted Weight Acrylic: 9,086 yards
Joann Yarn: 309 yards
Knit Picks Swish Superwash: 220 yards
Lion Brand Suede: 488 yards
Wool-Ease: 522 yards
Patons Wool: 390.3 yards
Plymouth Encore Worsted: 1,300 yards
= 17,157.9 yards
Grand Total Now = 48,646.4
I will consider this my real starting point, as I believe it may include all my stash. I do, however, reserve the right to adjust my goals if I discover more somewhere in my house!