Record a backing track in Aminor. Use a clean sound so you aren't to tempted to burn it up with the old licks. My progression used the following chords: Am, G, F, G. Use open chords since they sound better clean, IMHO. Now since we know Aminor had the notes A,B,C,D,E,F,G,A play ONLY on one string ONLY these notes. Start slow and say the note names as you go. Start on the high E. Don't worry about phrasing just yet. Engrave the notes and patterns into your brain. Remember: only one string at a time. Don't worry about starting on A. Start on open E. Once you are cool with that, start building some licks. Use triplets, speed picking, whatever. Remember to take time to let the some of the notes "breathe" (that was a challenge for me). Record yourself. You should sound totally different. Now go to the B string and do the same. Once you got that down, use both strings. Then go to using only G string, then the E,B,G together. Get to the point where you can solo on each string alone. Finally all the strings. At this point you will have a real good understanding of the fretboard and some cool new phrases.
Key points:
1. ONLY one string at a time.
2. Say the note names when learning the pattern on each string.
Hope that helps!
A few hours of this and you will find some new REAL cool stuff.
BTW - Don't put the guitar down just to try to break out of a rut. All that will do is bust the chops. Must be a wife or girlfiend that told you that.....lol (just joking) :D