At the moment.. 
 
2 octave scales over 4 strings 
Major, melodic minor, harmonic minor and modes thereof. 
 
Chords of each scale type, then with upper triads (1,3,5,7, 9, 11, 13) 
 
If nothing I have to learn, then choose a standard jazz tune. Melody, walking bass, soloing. 
 
Maybe some repetitive exercises in front of the telly.  
 
It makes Back in Black a piece of p@ss.