Defense keys & designing your defense: Technique, reading, & mindset

What do you look for in your players defensively? Christy Johnson-Lynch looks for 3 main keys when designing her defense and figuring ou twhich players go where on the court:

1. Technique: are your players low, are they stopped, what does their platform look like
2. Reading: understanding the set, reading the hitter
3. Mindset: aggressive player who will play really, really hard no matter where they are on the court