3. Cover the Character Names
Development executives, studio readers, producers, and talent often do this in order to problem solve whether or not characters are distinctive. Screenwriters should do the same.
While reading your script, cover the character names above the dialogue. You can do this with your finger as you read, or you can utilize screenwriting software—or a black sharpie for hard copies—to take those names out.
As you read along with the character names removed or covered, you should be able to tell the difference between who is saying what in your script. They should have their own voice. If you find yourself confused and unsure of which character is saying what, there’s a problem.