cfinotebook.net was my best friend when studying and prepping. I would have a lesson plan for each maneuver prepared and ready at the examiners call (also know your FOI). One thing I did that helped a lot was researched my examiner. I knew exactly what he looked for and what he has had past cfi check ride applicants do. On top of studying everything else, I made sure to go into his hotspots in excruciating detail.
The flight portion really isnt that hard because if you mess up or get out of tolerances you can use that as a teaching moment of what you did wrong and what you could have done to fix it.
its a long checkride but it actually goes by quickly since you are always on the hotseat
hopefully this helped some, good luck!
Liberty Pilot