DM Crash Course

Last week I DMed for the first time. I've only been playing for a few weeks now, so it was pretty interesting to DM so soon but my brother is visiting in a few weeks and I volunteered to do that session. So there has been a lot of cramming going on. Currently I'm visiting my parents and am sitting here on the couch figuring out what I need to learn while he works on his character. So far I've been using these resources to prepare for the session:

Primary:
Dungeons & Dragons Dungeon Master's Guide: Roleplaying Game Core Rules, 4th Edition
Dungeon Delve: A 4th Edition D&D Supplement (D&D Adventure)

Secondary:
Dungeon Master 4th Edition For Dummies (For Dummies (Sports & Hobbies))
Campaign Sourcebook and Catacomb Guide/Dungeon Master's Guide/Rules Supplement/ (Advanced Dungeons and Dragons)
Dungeons & Dragons Player's Handbook: Roleplaying Game Core Rules, 4th Edition
Player's Handbook 2: A 4th Edition D&D Core Rulebook (Bk.2)