So... with my half-marathon just 6 days away, running is on the brain. All the time. Except when I'm trying to impart mathematical wisdom to teenagers. And even then, I try to work running in. ( Example daily warm-up question : If Jenny averages 7:36 miles for 26.2 miles, what would her finish time be?) The thing about half-marathons and marathons is that you usually only get one chance . If you mess it up, that's it. You might be able to come back in a few weeks and try again, but probably not. You train for weeks and weeks and you have one race. At my favorite race ever - Washington University STL under the lights. This was the first time I broke 20 in a 5km. One of my favorite running memories ever. This is very different from 1500m/5km training (like I did in college), where if you have a bad race, you can usually bounce back the next week. You're racing every weekend or at least every other weekend. Okay, so what are my goals for this half-marathon? Let...