Gotta do this before you hop on the bike! I’ll figure out my power points for the workout, write them on a strip of painter’s tape and stick ‘em to the wall. Sometimes I’ll also write down the accompanying cadence but I usually save the cadence calls for the latter intervals when power starts to get a bit iffy. Then it’s a mental game of making sure the ol’ Wahoo always hits 100 or whatever (I use my headunit far more than the TR app).
Returning to the OP – VO2max difficulty – one good thing about their difficulty, for me anyway, is that it’s all local/acute. All the pain and suffering is then and there, there seems to be no carry-over fatigue like there is with long SS/Threshold sessions. I’m sure my heart disagrees but my body feels just fine the next day.