Don't Focus on the Present
If you accept the premise that training cycles are the method by which you will improve your climbing, you should be able to focus less on the day-by-day fluctuation in your performance. At least, I should be able to, since I accept that premise. Yet I still struggle to not be moderately disappointed if I don’t perform as I hope. The antidote is thus:
Build a plan. Evaluate success on how hard that plan pushes you, while still being possible. Then follow that plan.
I missed the mark in a recent session because I couldn’t put together a plan that was challenging and possible. One or the other was easy, but I couldn’t get both.
My goal was a ten-move sequence on a systems board that was very challenging, but could be barely be done repeatedly with 60 seconds of rest between attempts.