When I was younger I would regularly work through a bunch of scales in several positions on the neck, ALWAYS using a metronome and picking at either 1/4 or 1/8 notes.
Then I set off on practicing to a few records, playing songs I knew and then trying some songs that I struggled with, focusing on the parts that I needed to learn.
In the back of my Guitar Handbook was a bunch of chords, so I'd go through some of them, always trying to learn new chords or different inversions.
Granted, it's been a LONG time since I've had a practice routine, but all that work I put in when I was younger has really paid off over the years.