▶ How to Knit and Purl, Continental-Style For Dummies - YouTube
Discover two easy (and quick!) ways to determine the weight of your yarn, whether it's mystery stash or hand-spun. They're not perfect, of course, and you might still have to swatch, but there's no chart needed.
Fixing Twisted Picked-Up Stitches
Classic Elite Yarns: Dropped Stitches, Part One
Knitting Basics: Yarn Weight Explained | AllFreeKnitting.com