Its just a matter of fact we have to accept. Not accepting it is just puerile, since we all die, so better to just accept it as an inevitability, like getting old.
My way of doing so is just living in the here and now, live in the moment, enjoy the time you get to spend with people you care about, or doing things you enjoy, even making a difference. Some of the greatest people in the world are long since dead, but they left a legacy behind, meaning their lives were worthwhile.
I'd sooner be someone who gets to experience all the good stuff life as to offer, enjoy the quiet moments, taste all different kinds of foods, read good books, paint or write something, then be someone who spends every weekend praying to an imaginary entity, because I can't think of anything sadder then giving up a portion of your life to a cult, fooled into believing something, rather then your own self discovery.
Live in the now, do awesome stuff that makes you feel alive, and you make it worthwhile.