One of the concepts we've both ascribed to we borrowed from Patrick McCann & the Endurance Corner coaches. It actually is a four-concept process:
1. Race day is about execution more than fitness. Execution is defined as the ability to run well off the bike in triathlon. Conservative bike pace strategy can be corrected on the run, but riding too fast will bite you in the behind.
2. Everyone will reach a line where running, or running at the same pace you started, will be very hard. Focus on execution is critical to not slow down.
3. To execute & create conditions for success you have to define what you can & cannot control; what you cannot control you can only adapt to.
4. We all hit the line eventually. That's where the goal or the reason you're doing what you're doing becomes critical, or else your day becomes very long.
Steven Covey talks about the circle of influence & the circle of concern in his Seven Habits of Highly Effective People, & it's much like EC, except EC calls it the box. Stuff you can influence or control are inside the box, stuff for which you have to adapt, adjust, endure or get around are (of course,) outside the box.
Approaching the half-way mark in this training cycle, things are beginning to become...interesting. I've started to see the box because the week's training volume is slowly increasing, both mileage & time (mileage more than time) spent. As you start moving closer & closer to the target event & the longer swims, rides, & runs start popping up on the calendar, you're praying like mad that nothing else infringes on the time you're going to have to spend training, recovering...or working at the real j-o-b.
When companions, contemporaries or loving friends start throwing unprocessed fertilizer base material in your general direction, either intentionally or unintentionally, then you have to figure out whether it deserves to be in the box - & controlled - or thrown out of it & either adjusted around or plain flat out ignored as an inconvenience.
Telling your boss about your event goal is probably an inside the box action. Dramatic situations initiated by factional groups in the local running community...more likely outside of the box.