This guy has just the most perfectest technique. (I bought the head and hands book as well as the three dimensional drawing book in a bookstore on a trip to argentina... gotta love South America.) I'll post a plate every now and then.
The fun with a pencil book by andrew loomis is very hard for me.
Trying to get the ball and plane correctly. For me this book explains how to set the ball and plane technique in a much clearer way than the head drawing book of loomis.