Harmonics!

When working on technical passages at extreme tempos, don't forget the added possibility of harmonic fingerings! For example, overblowing at the twelfth (fingering an A to Bb  in the staff, but producing the sounding pitch of E3 and F3) can produce a sound that is more in tune (ie less sharp) and reduces lots of 'cross fingerings' between the right and left hands. Harmonics can be used on both flute and piccolo: just be sure to use firm support and a relaxed embouchure for the best results.