Grandparents, great-grandparents, uncles, aunts or closer, I'm sure you have someone that passed away before you and you miss them. You should look them up.
They'll probably have a lot to teach you about the after-life and you might have a lot to tell them about the world you left behind.
This is also a great chance to meet all the members of your family you never got to meet while you were alive, because they lived and died before you were born.