Draw your storyboards. Keep in mind the storyboard language. You need to know 13 basic terms. "Close-up" is a shot at close distance between the camera and the subject. "Dissolve" is a transition between two shots. "Fade Out" is a transition from your shot to black. "Fade In" is when your image becomes brighter. "POV" is point of view. "Tilt" is use of the camera on tripod (it moves up and down). "Zoom" is when the camera lens move closely towards your subject. "High Camera Angle" is a camera angle that looks down on its subject. "Low Camera Angle" is a camera angle that looks up at its subject. "Long Shot" is the broad distance between the camera and the subject. "Pan" is a movement of the camera in a scene from point A to point B. "Reaction shot" is a shot of a subject looking off screen. "Jumpcut" is a rapid abrupt transition from one scene to another.
Scan your work into your computer. With Word tables, create your storyboards (one or two screens per page). The table must look like a breakdown page from commercial production. Paste your sketch into the table and write your frame description. It must include what will be on a screen and your directorial comments.
Make your storyboards adaptable, rearrange them and move them around. Cut and paste your narrative into your table. You need the exact words from the script to match your frame description. Include media lists for your pre-visualization. These are basically lists of visual or music references for your script (songs, films, magazine and newspaper articles, books etc.).