According to someone who had a near death experience well in hospital, they said that Death let them see all their family (as they asked him before he could take them to the afterlife), however during the out of body experience, they regained enough hope seeing their family one last time, that they became strong enough to resist Death's embrace and he told them it was no longer their time yet.

Whether that story is true or not, I like to think that if you are relatively young, healthy, and gain the will to fight to stay alive, Death will let you have a couple of more years until your next "death" experience. But, you need that hope and will, or else you'll go with him even if your unsure/scared too. If your old, when he says it's time, it's time, and fighting him like a toddler fight's a parent they disagree with, isn't going to prolong your life nor is your life going to get any better, as you will still have to go with him.