One thing on regret before we get to the list. It’s important to remember that whatever stage we are at in life, there is no need for regret. The process of regret is one that provides nothing but suffering for ourselves as we begin to allow the past to dictate how we should feel now. Instead, we can use the past as a reference point to understand what adjustments we would like to make moving forward.
The adjustments do not have to come out of pain, sorrow, regret or judgment, but simply a choice to do things in a different way. We are learning all the time, we can very quickly slow that learning process down by getting stuck in the idea of regret. When it comes to making changes, be at peace with the past and remember that each moment is a new choice. MORE
http://myscienceacademy.org/2013/05/14/the-top-5-regrets-of-the-dying/