As I was reminded at the Gulag; today is International Holocaust Remembrance Day.
There are many ways to commemorate the occassion; in Tuzla; there is a monument of a tear drop for all genocide victims. The book "Auschwitz: A New History" by Laurence Rees is an excellent book in terms of both scholarship and writing style. This book is particularly important as today is also the anniversary of the liberation of the Auschwitz death camp.
But, perhaps the best way to commemorate the Holocaust, is to remember that genocide is not horror confined to the past.