In answer to Kevichella's question about how I would choose to live my life, my answer is this : I wouldn't mess with my life span at all. I'll take it as it comes - the good, the bad and the boring.
I don't know how many days / months / years I have left, but I'll live them to the fullest, just like I always have. Besides, how would you know that the one day of life that you had settled for was a perfect ten if you had no other day to compare it to? Just something to think about.