Just recently, I discovered Lesley's blog Racing It Off. A couple of days ago, Lesley had a post entitled "What I Learned From My 6-Year-Old." I loved this post because a) it was absolutely precious, b) her daughter Lily is hard core, and c) I think it is a GREAT example of both positive self-talk and expectations, both of which I've written about here and think are some of the most important keys to the mental part of strong (and enjoyable!) running. It doesn't sound like this is something Lesley has explicitly coached Lily to do -- she's just doing it, because it works!
So yeah. Consider letting this little girl inspire you on your next really tough run. :)