How to regret nothing
How I did it: Its all in how you think. If you look at an event and only see the bad then you will naturally regret it but if you can dig one good thing out of it then you can chalk it up as a lesson and make it valuable.
Lessons & tips: Find something positive in every thing you are tempted to regret. Dont ever say you regret things. Say "No Regrets, only lessons learned."
Resources: The Bible