I could have saved myself a lot of grief!
Don't be a workout hero.
It doesn't matter if you can crush everyone in practice one day, or one set/rep/interval of a workout, and then you're left struggling through the remainder of the week. Your performances in training need to be repeatable, day after day. That is how you build. Workout heroes often do not perform well in races, when it counts.
Patience
Continuing on the above, being patient with fitness. Realize that it takes time to build to peak form, but it also doesn't have to take A LOT of time. Just good, honest work, everyday, with small gains week by week - one thin layer on top of another.
Be process oriented, instead of result oriented.
Keep the ultimate goals in mind, but don't let them consume you. Focus on the work that needs to be done to get there, that is the "journey" people talk about it, and it is what makes the good results so much more meaningful.
Know when to back off
I hurt myself a lot by being tough. Tough is good, but when it's right. There is a difference between being a bit tired and lazy and your body being fatigued from training and needing rest. Sometimes you have to push through it, but other times, it is better to back off a bit and come back stronger the next day.
Group Eleven – Websites for Athletes / mikael.racing / @mstaer