Allen started this sesson by making a drawing of  his concept of what the practice session consist of. (See below). He then stated the following: "Beauty" is my concept.

1. Start with good sound
2. Maintenance phase
3. Play music.  "Buy low - sell high"

Some important notes:

• Warm up the most important you can do. Always - mental also. Music becomes important.
• Physical.
• Challenge.
• Making sound.
• 90% of trumpet players think physical. Don't do that!
• Being relaxed - letting the air flow. Even if not technical good you can play beautiful phrases.
• The audience (the non-trumpet players) want's to feel something.
• Good big sound - "aggressive" from the start on the mouthpiece.
• It's not an easy instrument - you hear mistakes.
• Being aggressive means beginning with the breath.

Low degree of tension is the goal. Doing away with physical tensions.
Lip slurs not good for warm up. Use it later in practice.

Breathing exercises:
A
Count: one - two - three - breathe in (on four) - breathe out.

B.
one - two - three - breathe in - hold a little - breathe out.

C.
one - two - three - breathe in - add more air, add more - breathe out.

 
The Warm Up:
The whole group participated. We used the warm up routines from his books.

On the mouthpiece
Glissando from middle G up to G above staff, then down to pedal G. Crescendo on the last note.

On the instrument
Repeated C's tenuto then staccato. Continue down to low F sharp.

Smooth tones
In his book it is called "Long Tone Exercises".
Playing C - E - C, then C - E - G - E - C, etc. Going down all the seven valve-combinations.

Technical Studies
The Technical Studies in book one are variations on Clarke 2.
What is missing in the Clarke book is other scale types (minor, whole etc.).
Also use chords and not only major like in Clarke, but "jazz"-chords with raised or lowered 5th and 7th. (eg. C-E-G#-Bb).
"Why note learn half of improvisation, when practising?".