I just updated my page of Practice Tips for Brass Players. I have been using these concepts, exercises/drills with my brass students in my private studio and at school. They work. I am seeing good results (eg. strong players, beautiful open vibrant tone, strength, range and endurance improvement).
Here’s the best advice you will ever hear: Arturo Sandoval http://www.youtube.com/watch?v=rlJ6OiVLX9I