Originally Posted by: GuitarPsy does it just involve playing with a metronome and increasing the speed as you go as long as it feels comfortable? or is it also about how you hold your pick? how you turn your wrist? how to position your arm?

Metronome use it the best thing to help with this. Start with a tempo you are comfortable with, and move up slowly in tempo in your routine until you hit your wall. Even if it's only in small increments of tempo, those little bits are really helping. Once you start to feel that discomfort stop practicing and come back the next day and see how you have progressed. It's very much a weightlifter type of approach.