1. Enclose dialogue in quotation marks. In sections of dialogue, indent for each new speaker, no matter how short this makes your paragraphs.
Punctuate dialogue and dialogue tags appropriately. Dialogue tags are the names of speakers and words like said, shouted, or whispered.
“I will go,” I shouted, furiously throwing clothes in the open suitcase on the bed.
My mother answered, “Over my dead body.”
“Then,” I threatened, “please leave my apartment.”
2. Enclose thoughts in quotation marks, as if they were spoken.
As I stared up at Professor Johnson, I thought, “How did you ever learn to talk like that?”