Set the scene. The easiest way to begin a Broadway play is to know where to begin. You will want to set the scenery as well as the main focus for the play through either a sketch, outline or by beginning the script.
Set the characters. Character development in Broadway plays are important to ensure that everything fits together correctly. Making sure that you set the main characters, the enemies and the friends will allow you to make the most of the play. This should be combined with certain personality traits, flaws and physical characteristics that you want to be seen in the play.
Set the plot. Whether you begin with an outline or with writing the details, make sure that you begin to build the plot. Starting with a problem, conflict or desire for character development will allow you to set something different. As you set the plot, make sure that you are aware of building towards a climax within each scene.
Outline both act 1 and act 2. Typically, Broadway plays will have 1 to 3 acts that are in them. Each of these will work towards the main conflict. Act 1 will set the conflict, Act 2 will build and climax the conflict and Act 3 will resolve the conflict. Knowing when to split each act, as well as the scenes, will give you a better idea of how the play will flow.
Set the music. Once you have the acts, scenes and main components together in each area, set the music. You should keep in mind that every scene or every other scene should have a song. With this, you will want to combine the two types of songs used. One is to display the feelings of the character and the other is to show the thoughts or actions that are taking place. Knowing when to use each one will allow you to walk everyone through the play with the music. After you have the main music, make sure that you put together an overture, which will help to introduce the entire play through the music.
Combine the flow of the scenery. Once you have the music and the main plots outlined, you can flesh out things such as dialogue, actions and movement. This will give you a way to put everything together and start working to develop it.