I'm pretty sure the person who started this post has already taken their checkride...but just in case another CFI applicant reads this, I'll write it anyways because this is what I look for when I conduct a CFI checkride:
First...if your intial CFI is with the Orlando FSDO, pray. Second, make sure you are familiar with and have ALL the references in the PTS (FAR/AIM, PHAK, AFM, AIH, plus all those little Advisory Circulars). You should have lesson plans for all ground and flight maneuvers listed in the PTS. Don't forget the aircraft logbooks either. The Orlando FSDO has a nice checklist on their website of all the things needed to make a plane "airworthy". Third...teach to the level they want...I've seen several students fail because they tried to teach a student pilot CFI material (a student pilot could not care less about equation for the coefficient of lift and it just opens you up to more questioning). Fourth...stay calm, cool, collected, and MAKE SENSE. If you get nervous or caught up on something, take a minute for a deep breath, say "Let me get the reference for that" and move on. I've seen a lot of people go on about non-sense for 20 minutes then say the wrong thing. RELAX. It helps if you keep in mind the fact that you already are a CFI...your instructor said so in the back of your logbook. Finally...dress and act professional. Show up in board shorts and flip flops and you're screwed. "Yes sir and No sir" go a long way...after all "Professionalism" is a required topic on the checkride.