#1
I've been focusing on the Am pentatonic (Blues) scale... aside from the learning the scale shape up and down the fretboard, i've memorised where the root 'A' note is throughout... what other scale theory would be useful to know at this newbie stage?

Thanks.
#2
I know guys like Clapton will play notes from both the major and minor blues scale in the same song. Check out Key to the Highway on Layla.