That is certainly relevant to me too - I had 3 bereavements last year in the family and have several friends or parents of friends who are currently living with cancer, one at stage 4.. I have learned to live every moment and take lots more chances (like leaving the day job) rather than find I have missed an opportunity and run out of time.
I can't say I regret it, tho I do have fears for my longer term security I am at least living my life now.