A storyboard is a visual shot-by-shot plan for your film. Some filmmakers love them, others ignore them, but you'll never know if you don't try. Storyboarding can really help you put things together and make shooting go a lot faster, but adhering to it too strictly can kill creativity on set. I find it's best to think of it as an outline rather than a set-in-stone decision on how things will go.
Here's a template for creating your own storyboards. To use it, draw each shot of your film in order (before you shoot it - remember this is to help you visualize what you want to create) and write notes about the shot in the space below. These notes should include information about camera moves, actor movements, and/or dialogue that happens during that shot. Remember to number your shots for easy reference!