I'd just finished reading Piper's 'Don't Waste Your Life' and it was really helpful to hear bits that I recognised in his talk but have them expanded and expressed differently so I understood them just a little bit more. And lots of new material too.
Colin Buchanan is such a professional. As much as I enjoyed his music, and I did, I also learned so much from him as a song leader. It's actually okay for the song leader to totally stop singing and let the congregation take it away. Very cool.
My 'high' for the evening: If singing praises to God sounds that good with 3200 people, how great is heaven going to be!!