Listening to as many guitar solos as possible is the best method for someone in the early stages. But saxophone solos can be helpful. They're interesting because they are all single notes, and therefore can be repeated on the guitar. If you can copy a sax solo you're playing very well, because the average saxophonist can play much better than the average guitarist.
Ritchie BlackmoreSession work makes you more strict. You can't hit notes all over the place. You've got to make each one really count.
Ritchie Blackmore