What is the most valuable career lesson that you have ever had? Please share your experience.

Never to trust anyone at work. Always have things in writing.

work smartly         &   do not expect the appreciation or reward ...............  ALLAH ALMIGHTY IS THE ONLY WHO IS SEEING YOUR EFFORTS & WILL SURELY REWARD ,,,,,,,,,,,, NO DOUBTS  

There are many lessons,but the most valuable lesson(s) to me:

1. Love your job and do not love your company,you don't know when your company stops loving you!
2. There are no friends in the work place,just colleagues!

Everybody lies!!!..

Do not under estimate anyone in life. Everyone is God's Creation. Your duty is to play your role perfectly.

I have recommended a needy one - very brilliant--but he was playing "Candy Crush Saga" all the time for about1 year.  any judgement on hearsay  will upset our expectations.

Thanks Ismi !

People give nothing for nothing ! 

Never believe that your job is lasting ! 

Most important lesson is that there is no place for friendship at work. I can call it a war zone or a battle field. One day everything is fine and suddenly you see rockets and bullets coming you way.

Agreed to all

Build a relationship of mutual trust and respect with your boss and having a difficult boss will serve as an excellent platform for Learning

Up to this time my lesson is learning without spirituality is valuless.