The WTS racing season is finished for another year. From my observations & experience, here are some of my opinions of errors made during training.
Too much training based around other athletes, rather than what you need to do.
Tip: Be selfish, and put yourself in an environment where your needs are met.
Not enough recovery.
Tip: Make sure you take a 20 minute power nap during the day & bed at a sensible hour.
Doing that session even when you are a little sick. You are much better leaving it for another day.
Tip: You are more likely to benefit in the long run rather than dig a hole by doing the hard session.
Too much reliance on coach, physio & other practitioners & not enough responsibility taken by the athlete.
Tip: Learn to be self-sufficient.