As eracer said, target oriented. Tell him to hit it to like the 100 or the 150, whichever yardage he could reach if he would hit it "just that little bit better". That way, that one time he does get it there he'll want to do it again, and the only way he will is to catch it a little better.
I can remember the first time I hit it to the 150, I went nuts screaming at my dad "did you see that dad!??!? I got it all the way there!!!"
That was fun
