I hope you don't mind me starting this thread but I suspect it's one you'll find interesting. So often as brass players we "warm-up" to "practice" to "perform!" A great Jazz Trombone player (Ed Neumeister, in Vienna now and was in N.Y. for many years) once told me he likes to go right to "perform" the first thing everyday. He performs his warm-up as an improvisation. He may play many of the same things we all do, long tones and lip slurs etc. But he improvises from the first notes of the day. Over the years I've experimented with this and find I can do some interesting things when performing for an imaginary audience. Pick a tonality (say, minor pentatonics) and create a melodic phrase similar to the Cichowicz Flow Studies. Play and rest but get your mind into the meditative state that we all like to be in when we perform. Do this melodic pattern in all minor pentatonic scales with the sound you really want coming from your bell, one that you'd want an audience to enjoy. Follow with slur's through the harmonic series (lip slurs), those are easy to create yourself. Pick a scale (say, Natural Minor) and improvise a tonguing pattern with single and multiple articulations, cover the range of the instrument and play as if every note was in front of your friends that came over for your daily recital. End with a spontanious composition for un-accompanied trumpet. Pick a style you like, be expressive or combative or however you feel but get into the music. Rest, sight read, listen to music, practice what ever really needed work (my slurs are not even today!). Anyway, try improvising some part of your routine and pretend you are performing. And they all love everything you play!!!!!