The Rhetorical Triangle - Sandwich Technique. Start each paragraph with a lead-in sentence to introduce topic, follow with evidence, & summarize topic & point made with a concluding sentence. Write the introduction & conclusion last based on ‘big picture’ of the writing’s intent. The intro & concl frame the message’s effectiveness, meaning it becomes the bookends of the writing’s personality. The part that hooks the audience (intro) & the part that leaves a lasting impression (conclusion).