How To Write A Flashback Into A Story . Make sure a flashback is necessary. Targeting what you want readers to take from the flashback only strengthens the story and makes the flashback more memorable. How to write a flashback from yaphomeworkxcr.web.fc2.com A clean, concise thread connecting the flashback to the character. Putting the inciting incident into a prologue is often done when there is a significant gap in time between it and the start of the main character's throughline. Writing flashbacks are fun and can be a great way to create a sense of history within your narrative.