Directing

Basics
For right now I recommend this blog series:

No Film Schools' The Director's Chair

Recommended Books
"Directing Actors: Creating Memorable Performances for Film and Television" by Judith Weston 

Highly regarded and a great read. If you even just read the first fifty pages, your actors will greatly appreciate it. She has a second book as well, the "The Film Director's Intuition" by Judith Weston. Not sure if it's good or not.