When I live knowing that I will die, I live differently. I try to live on purpose, consciously in the moment, fascinated with whatever life has put in front of me. I try to be curious, like a child, seeing things for the first time.
Or I could think, "This might be the last time I see this, make it count."
I tend to stop being petty, or complaining about stupid things. I tend to not criticize things that do not matter.
Death is the biggest letting go that exists. At death, we are forced to let go and during life, we practice letting go many, many times. The better we do during our life at letting go, the better we will let go at death.
Perhaps this is part of the reason I gave up things during Lent.