Range improvement exercises?
Hey guys, I've been playing for a solid six years and I'm proud to say I can hit some damn high notes. However, it's hard to be able to consistently smack them right in the middle, so do any of you trombonists out there have any tips on how to improve and sustain in the upper register?
Apart from practicing more in general, of course. 
I've been playing Tromebone for 9 years and I must say that I owe a lot of my range improvements to lip slurs. You start out in seventh and use your lips to play a C and slur up to an F and back to a C and then up to an A and then up to a high C. Then proceed to do so on the remaining positions. It sounds confusing but it works a lot. I can officially hit a third octave D and hit a tuba B flat cleanly.
Yeah, you really can do any variation you like with those. I sometimes like starting in first, and going Bb1-F-Bb1-F-Bb2-Bb1; then I copy the partials all the way down to seventh. I can hit... uh... I guess it's a third octave F? It's one partial higher than the D, lol, I just want to be able to play it consistently. Lip slurs are my warmup exercise, and they're great. Any other suggestions?
I've been out of it for a long time, but from what I understand the only solution to hitting notes squarely is practice, practice, practice. (High lip-slurs, in this case, to condition your lips)
Something you might look at is your mouth-piece. When I first started playing higher notes in jazz-band I was having a terrible time keeping a note in the center, even if I hit it right. My mentor-dude called it right when he said that I was using the wrong mouthpiece; the MP I was using really didn't lend itself to the tight airstream.
What MP are you using? Also, here's a good link:
http://www.trombonelessons.com/mpanatomy/mpanatomy.html
but one of the best ways to get a higher range is actually work on your lower range. i personally started on tenor and moved to bass, and when i came back to playing my tenor, my high range had significantly improved as a result of my low range
Same here with the bass aspect, I think that's due to the mouthpiece and volume of air required. Look at it this way, if you practice double high octave notes on a 1.5G MP, then move to a 6 1/2AL MP your notes will just naturally come easier. Mostly because it requires more lip strength when using a larger MP. Just do the lip slurs and try long-tones starting on 2Bb and going up the chromatic until you cant go any more, or your lips hurt, but don't push it too hard. Too much practice can be a hinderance if you're not careful.
I've been playing Tromebone for 9 years and I must say that I owe a lot of my range improvements to lip slurs. You start out in seventh and use your lips to play a C and slur up to an F and back to a C and then up to an A and then up to a high C. Then proceed to do so on the remaining positions. It sounds confusing but it works a lot. I can officially hit a third octave D and hit a tuba B flat cleanly.