Instead of boring exercises, try fun exercises. My organ teacher, of 25 some years ago, asked me to buy a book of jigs and reels, and to work on these pieces. They were fantastic finger exercises, they had to be played quikly,but not boring, because they were an actual song, not an exercise. After "practicing" on these jigs and reels my fingers would burn from the workout.
Like U.D. said, mix it up. I might start practicing a piano piece in full keyboard mode (no arranger), get bored, and play that same song with the arranger. This reinforces the right hand, or I might play some other song I know.
Starkeeper