I encourage my students to practice every day, even if it’s only for a short time.  I ask them to practice scales, etudes, specialty exercises and of course, work on their pieces.

Some other thoughts on practicing…

How many hours a day should I practice? 
Leonard Garrison’s thoughts on how to practice

Here are some words of wisdom from Sir James Galway about daily practice, and specifically, practicing scales.

Practicing Scalesfrom James Galway Masterclass – Youtube Video

Daily Practice & Scales – from James Galway Masterclass – Youtube Video