When it gets to the negative, get it out, get to the issues, but dont let the damn meeting dwell on that. Dont let bitch sessions last for very long. Psychologists would call this approach problem-focused coping, in contrast to emotion-focused coping. The latter may be more appropriate when facing a problem that cant be solved, but in a business context focusing on and venting emotions needs to happen quickly, so more energy is directed to solutions.
Trillion Dollar Coach by Eric Schmidt