This is a tricky question, perhaps you need to gain trust, but its very subjective because there some managers who started to be very good but ended up on the other side of the fence. Anyways, here are some topics I dig that can help you out:
WOW... These links are gold u just gave me. I really appreciate them. Yes, truly trust is one important thing in every aspect of life and should be very well observed so as to stay for long.