I read an interview with one of the Aeon guitarists once, in which he said his best bit of advice would be to tremolo pick on one open string/one note while you are watching tv or something until your arm gets tired. Keep doing it every time you are just doing something like that and you will build up stamina.

Just found it, its at the bottom of this http://www.sevenstring.org/forum/ar...on-of-aeon.html

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