Job change conversations

When an IT manager wants to move on from a present job, what’s the best way to break the news to superiors? How should IT managers hand over work assignments so as not to burn bridges? And what tone should the “I want to leave” conversation take with superiors?

I’m looking for advice and anechdotes from IT managers who’ve succesfully transitioned out of jobs into new positions. If you’d like to share, please write to me at dcgate@yahoo.com or post here.
-David Southgate
Freelance Writer
My BIO: https://www.techrepublic.com/authorbios/author_bio.jhtml?authorId=dcs