How is it, that pianists, or members of the forum, play pieces cold, and play it well on the spot? Is there some sort of secret to performing it on the spot?
Be prepared. Practice playing cold. Can you wake up in the morning and play your chosen show piece, on your piano, in your house, in your pj's cold? From there you gradually remove familiar items, like changing time of day, playing when your are exhausted, playing on a friends piano, playing on a completely foreign piano. Choose your show piece carefully. It should be something you can nail in any condition. You should be able to play it in an earthquake in a room with glass walls and chandeliers over your head, watching the lava flow outside the window, the weather reporter struggling to stand upright is warning of the hurricane to arrive in 2 hours, and completely enjoy the moment of music your are making. If that piece is a V I cadence, so be it, but play it well. (Tomorrow's forecast is sunny, high pressure, calm winds, and 25 C. Good day for a walk.)When you are ultimately faced with a real life request to play something, your reaction should not be: GASP do I have anything decent to play; but rather, I've prepared for this and planed for this, so here is my piece. Play it, and own it.This advice comes with similar conditions as timothy42b states. If you tell anyone, snails in black suits that have earpieces and talk into their shells will be watching from their convoy of black limousines. _@"
You play this, of courseSorry, couldn't resist!