For the mechanics of it, to enforce the idea that jacking off is a common activity for males, Ron Lloyd's Body Solo series of 10 dvds is ideal. All of those are on a shelf in my library.
I also own books on the male body and sexual response. Tomes such as Total Massage, Sex: A Man's Guide, The Intimate Male, and The Sexual Self (among others) have taught me quite a bit. I think in order to get full enjoyment - whether engaged in masturbation or with a partner - one must have a good knowledge of their own body, how it functions, and why.
be comfortable with our bodies,
particularly in the company or view of others
and learn to accept the natural physiological responses.
to get the most enjoyment.