Today in my morning edition of Knitting Daily, I learned that the I-cord–that knitted tube made from just a few stitches–was created by Elizabeth Zimmermann, master knitter, creator of the Baby Surprise Jacket and mother of the craft (at least, to North Americans). Did you know that? 
I did know the “I” stands for “Idiot” because it is such an easy thing to create–and so useful! 

If you’re not familiar with Knitting Daily, you may find it interesting and useful. There are free patterns and ebooks (as well as ones for sale), and the daily blog, full of tips, tricks and stories, is written and compiled by Kathleen Cubley.