Never complain and never explain.
To know oneself, one should assert oneself.
Things do not happen. Things are made to happen.
It's always too early to quit.
Know or listen to those who know.
The most effective way to do it, is to do it.
Be kind whenever possible. It is always possible.
Be gentle to all and stern with yourself.
Wherever you are - be all there.
By failing to prepare, you are preparing to fail.
Trust me, my runners aren't going to run one event while looking past it to the second event. When they get on the line for the 10K, that's a do-or-die situation for them.