Reading your 'Pearls of wisdom' article was very interesting and inspiring.
I've been running for 16 years and i think the biggest thing I've learned is "Take something positive from every run, be it a race or a training session". Not every race or training session goes well, that's life. But there's always something you can learn, always something positive to say, even if's just "I suffered and got through it!"
Running's hard so don't make it tougher by always focusing on negative parts of a run. Taking away a positive lesson will make you metally stronger.