Juggling music practice between instruments

Juggling practice is difficult when you play three instruments.
1. Piano practice is required for my job as a piano teacher.
2. Drumming is required because brass band music is difficult, and I want to keep the chair in the band. Furthermore, endurance takes time to build and repetition to maintain. To improve my skills, I take a weekly lesson and lesson preparation requires daily attention. 
3. Mallets. I love playing the malletkat and xylophone. And it is a required skill, on occasion, in the brass band. 

How do I do it?
1. Piano practice maintains my skills to the level required to serve my students well. I'm not preparing for concerts or gigs anymore. Therefore, endurance is not required. 
2. Drumming. I have a ritual I've been following for a few months. It starts with 20 minutes on hand warmups and chops building. I follow-up by reviewing a lesson from a drum kit book for 10 minutes. Then I tackle Brass band music. However, I only practice the tricky bits as there is no time for fooling around. With this I've covered chops, endurance, skill development, and being ready to contribute to the band. 
3. I do a few minutes in the evening working out of a lesson book and slowly chip away. 

​David