Please can I have any tips or any success storys for improving playing stamina - especially cornet players. I am a brilliant player for about 10 minutes, but then things start going downhill - lack of higher register, tone control etc. I have tried many techniques to try to help, but I would be particularly interested in your success story if you have any. My lack of success is getting me down. So much so, that I recently bought a trombone! Thanks for your help (and no doubt, humour).