Walk through the script with the director and producer. Discuss the purpose of each scene and ascertain how they plan to execute it.
Divide each scene into frames. Decide on the camera movements, panning and zoom for each frame.
Confer about the onscreen action and the dialogue, as well as the cast and their respective parts. Analyze the needs of the set designer and other crew members. Discuss what will be in the foreground and background in all important scenes.
Determine whether the format is to be 4:3, 16:9 or 2.35:1. This is also the time to consider budgetary restraints. Much of the costs of the production are incurred or avoided in the story boarding process. Get the producer's views on spending limits and pick his brain about the "production values" that he is willing to uphold.
Document all the essential details that have been shared about the script -- your views and others' as well. During the discussion use a thumbnail sheet to create rough sketches of how the storyboard will look.
Use storyboard templates to map out your storyboard. You can draw in pen or pencil, and add color if you wish.
Take photos, use pictures from magazines or graphic images on a computer if you are not proficient at drawing.