i've heard alot of pros say that using glisondos well help you develope you're high range. i've used them befor in my practice and they seem to help but i don't have any sort of pattern or exercise to go off of. dose any body know one or know a website to find one on

that is correct and they also help you develop a much more consistent sound throughout all registers.

When i practise them i just do scales starting from bottom F below the bass stave and working up by semi-tones per scale.

just keep the air flow consistent and full never force the air and make sure the everything you do on trombone feels easy. thats the secret to playing professionally, everything is easy.

Ash