Theme is the idea a story is really about underneath its plot. It is the answer to the question, what is this film trying to say about the world? Many writers either ignore theme entirely or hammer it so hard that the audience feels lectured. The skill is to hold a clear idea in mind while letting the story carry it lightly.
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Dialogue is the part of a script readers notice first and writers fix last. Good dialogue does more than carry information; it reveals character, builds rhythm and keeps a reader turning pages. Bad dialogue stops them cold. Here are the habits that separate lines that sing from lines that sink.
In life, we hint, deflect and talk around the thing we actually want. Scripts that ignore this feel flat because every character announces their feelings out loud. Let your characters protect themselves. The gap between what someone says and what they want is where tension lives.
If you can swap the names on two characters’ lines and notice no difference, the voices are not distinct enough. Vary rhythm, vocabulary and the length of sentences. One character might speak in clipped fragments while another rambles. These small choices let a reader know who is talking before they reach the name.
A well-placed pause can hit harder than a paragraph. When a character chooses not to answer, the audience leans in. Do not be afraid of white space on the page; it is part of the music.
Strong dialogue is rewritten, not improvised onto the page in one go. Get the scene working first, then pass through line by line, asking whether each one earns its place. The lines that survive that pruning are usually the ones an actor will thank you for.