I did so much lip and mouthpiece buzzing in high school and uni. I thought it was the right thing to do and that that same buzz was the mechanic for playing the horn. But today I found out I can just blow focused air through the horn and stay relaxed. Thanks to Charlie Porter and Greg Spence. Maybe I can finally use less tension!
Seriously this is a bit of a revelation! I had four years of university-level lessons and nobody showed me this.