My method on not regretting life:  1.  Acceptance for what’s [happened/happens/happening] (there’s scientific/philosophical reason to think all three are the same).  2.  Gratitude for opportunities I’ve had and those that are to come, and my favorite:   3.  Keeping my identity “loose” (Not identifying with culture/tradition allows me to see what connects them all, take the best from them, and constantly morph into whatever is necessary)