Step-by-step video editing from Andrew Warner: http://mixergy.com/video-editing/
Other tools Andrew uses:
I do almost all my work in ScreenFlow. That’s the program you see me using in the video above. It’s made for video and screen capture, but I swear by it as an editing program too. (Thank you Janet and Jeneane of Telestream for introducing me to this program!)
I edit audio using Audacity.