Mindfulness is the primary tool in that we get a little space between ourselves and the thoughts and then we actually can be more responsive, as in: Do I want to listen to that? Do I want to ignore it? Do I want to say "no thank you". Do I want to inquire if that's really true or helpful? So we start with mindfulness and we're not engaging, because as soon as we do that, we've given the critic authority. Instead, we want to notice the critic but not give it any attention, not really give it much value.