Every note you play, sing to yourself at least in your head. Let's say for doing a Paul Gilbert style alternate picking exercise. Anybody knows you have to practice that over and over again. How many of us sing the pitches or ever name the notes when we are doing this?
We are already repeating over and over again, why not add more to it?
This apply to everything take a basic chord progression ex. D, C, G, that you have done a million times. This time Arpeggiate the chords and sing the pitches. Since we all know this progression so well. It's a great place to start.