Composition

 What is headroom?  What is look room? What lead room?  Why are each of these important for your composition?

Look room: When a character is facing a direction, make sure there's room on the screen for them to "look" out to. There's space in front of the direction the characters looking. This means you should frame someone looking screen right on the left side of the screen. If you fail to do this, your character could look trapped or confined.
Lead room: Moving cars and objects need something called lead room. This is space in front of the direction a moving object is going. For example, a car driving screen right needs space on the right side of the frame, so it looks like the car is actually moving somewhere and has somewhere to go.
Head room: The amount of space above a person's head and the top of the frame. If you leave too much space, the character will look like they're sinking. Leave too much head room, and the character will look squished. Don't be too concerned with cutting off the top of the person's head, but their neck and a bit of their shoulders should probably be in the frame.