where the writers are
Fortune-Cookie Tips for Writers, #2

Commit the following to memory: "Thank you, you've certainly given me a lot to think about" - this will serve you well whenever you are tempted to kneejerk respond "How could you possibly say something so stupid about my book???" by preserving your relationship with that friend/relative/critique partner/agent/editor who may yet help you in the future, plus you'll seem so much more professional.