Good Influences on Performance
A clear understanding of the character's pre-history
A clear understanding of the story
A well chosen objective/intention/"need"
Real listening
Investing in the "need" of the moment and not anticipating the future
Being open to whatever happens next
Being relaxed
Trusting in yourself
Bad Influences on Performance
Just focusing on telling the story
Believing that a particular scene is a great vehicle for your acting
Striving to be good
Striving to exploit emotion
Failing to listen because it is already known what will be said next
Listening for cues not meaning
Acting (instead of inter-acting)