Read a lot of screenplays. When writing scripts, it is important to get to know other people's work, so get your hands on as many screenplays as you can find. Go for the scripts of movies you have already seen; study the action descriptions and the dialogue. Make a note of different tips to help you later on your writing.
Observe everything that is happening around you. If you want to come up with interesting, memorable characters for your stories, spend time observing people and situations around you. People-watching might be your most important screenwriting tool, since your characters will be the ones to give your script life. Drawing inspiration from real people can help you create distinct characters. Thinks about how they look; give them distinguishable characteristics and goals.
Magazines that deal with the art of screenwriting can help you out in many ways. A well-written article can provide tips that ultimately improve your craft. Magazines keep you updated with trends and other writers' latest work. "Creative Screenwriting Magazine," "Script Magazine" and "Scriptologist" provide in-depth articles for aspiring and professional screenwriters.
Books and seminars can be invaluable screenwriting tools. Aristotle's base of all creative writing, "Poetics," addresses the different rules of drama and performing arts in general. "The Screenwriter's Bible: A Complete Guide to Writing, Formatting, and Selling Your Script" by David Trottier is a detailed guide on every aspect of screenwriting. Also, "Making a Good Story Great" by Linda Seger promises to assist you in perfecting your screenplay.
Formatting your script properly is essential. Even if you come up with the best story and most interesting dialogue, your screenplay will not be taken seriously if it's formatted incorrectly. Study the script formatting guidelines and adjust your story accordingly. Keep it simple, clear and error-free. Screenwriting formatting software can help you do this right. Final Draft, Movie Magic Software and Adobe Story are popular software options.