LD- Value/Criterion block is key to me in this form of debate. However, use your contentions to detail how and why that is so. Remember, philosophy plays a big role in this. Flush out exactly why yours should be upheld more than your opponents. Speed is fine, as long as it's understandable.

Contentions are the building blocks for your value and criterion. Give well presented warrants and explain how it connects.

Analytics are fine, but back it up with well given reasoning.

Congress- Be involved! Ask good questions, understand your arguments as well as the opposing arguments, but most of all; keep the round moving.