It is certain that we will all die one day. No one was created to live forever. And what you do today, either good or bad, that is what you will be remembered for.
Live today like there's no tomorrow, the way you live today will be the way people will judge you tomorrow, and once you are died the good and bad you have done will be that which people will remember you for. So live today as if it's your last.
Do good to others and never hurt other feelings.