Friends of Sheep & Shawl, here are some of my favorite websites for knitting (and other) tutorials. Please check them out.
Churchmouse Yarns – Cast ons, bind offs, Kitchener stitch, measuring
Mason Dixon Knitting (MDK) – Short rows, all things socks, nearly 200 different topics
Tin Can Knits – Beginner knitting, lace, intarsia, cables, over 70 different topics, and a lengthy glossary
KnitFreedom – How to knit, increases, decreases, 30+ excellent free videos
VeryPink – Many videos of techniques and project-based tutorials.
Memorize the Kitchener Stitch by Lorilee Beltman (thanks to MDK for the link!)