Ok this isn't really a tutorial, it's more like a guide...no it is the guide. Every sewer or aspiring sewer should have the Reader's Digest Complete Guide to Sewing. The book is full of step-by-step instructions and explanations on everything sewing from how to sew a button, different types of interfacing and fitting your own pants.
This edition is from 1976. It belonged to my Grandmother and I love it! There are several editions of the guide to purchase. I believe the latest was published in 2002.