Striving to be a better game master

Can you suggest some good source other than the ones listed below:

1) "Master of the game" plus "Role playing mastery" by Gygax (but i never read them, i am just curious).





2) Several articles in Dragon magazine and in White dwarf magazine such as these series by Lewis Pulsipher




3) This little books that entice me that i found on rpgnow.com (again, i haven't bought them yet)

Look what i got in the mail today

I particulary appreciated the fact that this book published in 1982 contains review of fantasy role-playing games available at the time other than D&D, and reviews of magazines and fanzines as well (Alarums & Excursion, Different worlds, and the like).