My advice to Joe

Don't approach this weekend as a debate against Bernie Sanders. Approach it as a debate against Donald Trump. Prepare a quick rebuttal of the attacks you know Bernie is going to use and be ready to quickly pivot from that to turning the question against Trump and do that all night.

Don't attack Bernie. You are already the Democratic Nominee, so assume that role. You dont need to do anything to beat Bernie and he can't beat you. Don't let him control the topic, always go right back to attacking Trump.