Some thing I do that I discovered my self is the cough. I don't know if any one else has talked about this. Particularly when I come to a fast run with a rhythmic twist I cough in stead of tonging. It is a very light cough that allows my tong and lips to be as relaxed as possible and I get a nice round tone with plenty of attack all the way through. I also notice that I can jump ranges very easily. I guess it is a type of shallow breath attack. I could almost play this way all the time, but I don't. I discovered this when I had just started playing horn and had a cold. A cough hit me just as I went to hit a note and this incredibly articulate short run came out of my cornet. I thought there has to be something there and have worked and played with it ever since.