My ancestry is german/viking/celtic and the one tradition that has been handed down from generation to generation in my family to help with greiving(and it works), is to celebrate the person and the life they lived, the moments everyone had with them.

A persons funeral is a big party, everyone eats, drinks and laughs with all the good memories in celebration of the departed. So my advice to anyone that loses a loved one, celebrate their life, do not mourn their death.