I work on tunes, generally (finger style instrumentals). Sometimes I will devote some part of my practice time doing right hand drills though. When I say I work on tunes, I don't mean I just play them a few times through. What I will do is find the sections that are giving me issues and repeat those until my dog bites me,
Seriously though, I'll work the tune as though it's a series of exercises, breaking it into sections and not moving to the next section until what's behind me is good.