Don't just repeat or summarize your arguments. Select the strongest 1AR responses to go for. Set your agenda. End with a short explanation of why you have won the round. Re-tell the story.
Every affirmative has a narrative behind it.
Emphasize how your story is more plausible or more compelling or more anything than theirs is. Spend time on the issues that the 2NR spent time on. It will do no good to re-explain case for 3 minutes if the 2NR spent 4 minutes on a disad , a counterplan', and a topicality violation. Wrap up the debate. Explain why you should still win the round even if you have lost a few issues.