I should have added a better explanation. Im not saying you shouldn't negotiate hard, Im saying keep a vibe of optimism and friendliness, remembering why you're

I should have added a better explanation. Im not saying you shouldn't negotiate hard, Im saying keep a vibe of optimism and friendliness, remembering why you're there in the first place. Make sure every concession is written down and signed directly following the meeting. Be prepared to pull the plug if the negotation is not headed in the direction you want and dont be afraid to let the other party know if they're crossing that line where it's no longer an acceptable deal for you.