Thanks for sharing your thoughts on this.

If my reaction to a conference session is "been there, done that," I find that a good challenge is to try to state, in my own words, what I THINK I know about the topic being presented. If I can do this, I often find out that

-- No, I didn't already know that.

-- I knew that, but I have a different slant on it. What can I contribute to this conversation?

-- I knew that, but many others didn't, so no harm done to me -- and others are learning now, just as I did previously.

-- I knew that, but is there something that's preventing me from getting a new perspective from this presenter?