One way to remember is to try and appreciate the event at a human level. Technology moves on, employment standards change, business methods are superceded, but one thing that does not change is the human element. People are people, with the same basic potential. Learn about how people worked, how people lived, how people reacted to the disaster, how those not involved in the incident did what they did to rescue survivors and recover the dead.
Does it change your perspective on the tragedy? We who are "better off" with our education, social standing, employment security - how would we cope? So to record the anniversary, it might be an idea to learn from what we know of what happened and how people coped, and wonder how it would feel if the same thing happened to us.