Encourage your older family members to write or record their experiences,
I got my 88 year old grandmoter to sit down in front of a video camera and got her to talk about her life (seeing a Zepplin coming down in flames, children being brought out of a school after it was bombed, Great war ending, Second war blitz etc and more mundane family stuff like their first car) I just wish I had done the same with my grandfather (Steam powered submarines / M2 aircraft carrying sub, China being invaded by the Japs, Malta / Russian convoys). All that history witnessed by 2 people...yes get it recorded while you can!
edited to add...
My grandmother lent the Submarine museum a load of my grandfather's photos from his time in Subs. She said they could borrow them to copy and then they were to be returned to her. A year later I wrote a strong letter on her behalf asking if she was ever going to get the photos back. A month later they were returned with letter saying that they had a backlog of items to copy and shortages of staff...etc...etc...