Make a family journal together. Write a little each day about every-day events. Let your children decorate it with stickers, simple pictures, or mementos of the day. You can also do this on a large format calendar, such as the ones sold in office supply stores for desktops.
With older children and teens, be clever and use product labels or magazine clippings to remind the family of the day's events: Ex. The day was cozy and comforting like mac and cheese.