I've picked up some good advice and pointers from the books and youtube vids, but you just can't substitute books and videos for practice, practice, practice.
Agree with you there Jeff, no substitute for practice, but, YouTube vids are a great place to get some material to practice the basics and they can also let you hear what you're supposed to be playing, which is a great help. They certainly were (and still are) a tremendous help to me.
I beggined with Jpallen tutorials - single notes, diaframal breathing , all kind train's and diaf and t vibratos - still i can do good diafragmall vibrato but no t