In general, I have a tendency to push the limits. So today when I went out for my first run of 2012 (and my first run since Oct. 27th and my first run since I hurt my brain) and I made myself turn around at the 5 minute mark so I really would do a 10 minute run and not push it to a 15, 20 or even 30 minute run, I was quite proud of myself.
In the past I would have run until my brain started to hurt and then limped back home and spent the remainder of the day scolding myself for being such a bird brain.
Hmmm. Maybe you can teach a old dog new tricks.