Tip #1: Ask: Who is the focus of the story or storyline? Who is the story about? Who is important for us to follow in the Adventure?
Tip #2: Determine who changes the most and how.
Tip #3: Identify who has a Goal to pursue and what it is.
Tip #4: Use your Protagonist to create an emotional experience for your audience that is appropriate for the genre and for your intentions for the entertainment experience of your story.
Tip #5: Make your Protagonist face the Opponent in the battle, and decide whether or not they win their goal.
Tip #6: Make the Protagonist as active as possible.