"The past is a foreign country: they do things differently there" written by Leslie Poles Hartley. At the age of 49 I look back 20 years ago and really do view my neighborhood as a foreign country. We are so busy rushing through our lives that we don't take the time to enjoy what we have RIGHT HERE, RIGHT NOW.
That is what I would like to add to your time capsule. The knowledge that we should enjoy the present before it becomes our past.
Forgive the maudlin rambling.
"Certainly there is no hunting like the hunting of man and those who have hunted armed men long enough and liked it, never really care for anything else thereafter." Ernest Hemingway