When I was 19, this question occurred to me:
If a tree falls in the woods, and there are no conscious beings in the universe, does it fall quickly, or does it fall slowly?
This book answers that question.
I am too lazy to read the book in it's entirety, so I found an excellent summary.
http://beingsufficiently.blogspot.com/2012/12/the-asymmetry-of-being-reflection-on.html

If you read that correctly, you come away with the sense that every moment experienced is a miracle.
And it is only 5% bullshit :) That's less than my daily recommended allowance.

If I have one six-star book. This is it.