Prepare a memory game by filling a box with 20 small objects. Include one very memorable object such as a $10 bill.
Tell the class you are going to play a memory game. Take the lid off of the box and use the timer to give the class members about one minute to observe and memorize what is inside.
Put the lid back on the box and then instead of allowing them to immediately write down what they remember allow some time to pass (either let them visit or proceed with the lesson) before handing out the paper and pencil. Ask them to write down as many items as they can remember from the box. They should remember some of the items - but not all. I include a $10 bill in the box and everyone remembers that.
Repeat the exercise, but this time allow the class time to write down everything they see. After closing the box once again ask them what was in the box. They should be able to tell you everything that was in the box because they have written it down/recorded the contents.
Describe to the class how this activity shows us the importance of keeping records and journals. Although we may try to remember everything - as time passes it becomes more difficult to remember all of the details. Of course some events are very memorable and we won't forget them (just like the $10 bill), but it is impossible to remember everything. However, if we record what is happening to us in our journals, we can remember everything - not just the major events- no matter how much time passes.