Keyframes hold information about where your object is in space in the layout and time on the timeline.
The timeline shows you where your Keyframes are in your Animation
Allows you to manipulate Keyframes, a very important tool to animate your objects.
Helps you to smooth out your animations.
Can be used to animate lip sync or make poses
NonLinear Animator for animation (just like in softimage) Built into blender
It takes a bit to setup your objects, but this person animates his objects using the autokey feature for realtime feedback of his Character. He shows how to smooth the animation in graphs, and also to use proportional editing to massage the graph. He also uses this technique for the camera.
How to make a Product video - He goes over how to use an audio file in Blender and how to sync up your animation to the music. He makes an awesome phone commercial.
He shows you how to make a phone, and animate the phone, and some lighting for the shots. The Product Animation page is here.
Drivers allow you to automate animations
How to use the pose library. Wow, helps with animating phenomes
Look like this school is good. Their Students show good technique. Doing little skits like this with Audio from your favorite movie is a great way to practice Animation skills.