What's your greatest regret so far, and what will you set out to achieve or change before you die?

Top five regrets of the dying

A nurse has recorded the most common regrets of the dying, and among the top ones is 'I wish I hadn't worked so hard'. What would your biggest regret be if this was your last day of life?

http://www.guardian.co.uk/lifeandstyle/2012/feb/01/top-five-regrets-of-the-dying