< this is from my classical guitar technique practices >
http://www.sheetmusicplus.com/store/smp ... et%20Music
the book has left and right hand fingerings since its for finger-picking, but u can skip the drama for right hand and just alternate.
one of the things that is good to do once u got the notes for that scale down, is to not just run up and down, but suddenly turn around in mid of it, take couple of notes backwards, then run forward again.
another useful thing to do is to play most of the scale ligado (pull-offs and hammer-ons in plain language), just picking each string once.
Skip notes, instead of playing E-minor diatonic for example, just play Emi7 chord as a scale. If you really want to mess around, change the quality of the scale. Go from Emi to E7 or Edim. Teaches you not just ur chords (which you prolly already got down), but also helps you use em as source of melody. At this point non-linear playing will yield far more results.
What else...mixing scales around is fun. (once u r set on all of them, try to play bits from different scales so it sounds melodic
)all of this is additional what szukalski said.