Maximize your cleverness with this book! This is the ULTIMATE daily practice guide (or enchiridion)! This is the exact method I work through on a daily basis to make sure my technique is ready for anything that comes my way. It is especially useful as a clarinet doubler who spends a lot of time playing bass and e-flat clarinets in addition to b-flat and A clarinets. It includes exercises in: 
 
Long Tones
Homogeneity 
Note Bending
Articulation
Scales (with Low-C extension for bass clarinet)
Thirds
Major and Minor Triad Arpeggios
Dominant Seventh Arpeggios
Diminished Seventh Arpeggios
Whole Tone Scales 
Rhythm Tricks
Essentials from Jeanjean's Vade Maecum