I was thinking the other day of one of my favorite articles of clothing - the white t-shirt. I have a variety of them in my closet - from short-sleeves to long-sleeves, from crew neck to v-neck. I realized that I could likely never own too many white t-shirts. They are a staple in my wardrobe (and really a great choice under a hand-knit cardigan).
I think if you were to pose this question to knitters, what could you never have enough of, they would say "yarn". So, dear knitters, I'll modify this question for you:
Other than yarn, What could you never have enough of?