John, when I read articles, I try to think of something to add just to show that I read and was paying attention. I can't think of anything else to add to your list. I have always been complimented on my listening skills. I'm not taking credit for it though. I would rather listen than talk any time.  My favorite (because it's what I work on all the time) is the tip on distractions. It might be impossible to remove distractions physically but mentally and emotionally, the only way to really listen is to think of conversation as heart to heart. Make your conversation all about the person talking and practice heart level listening.