I like to think of life and every single day like a book! Every time you go to sleep, you flip a page in that book. Don't even try going back a few pages because every single page you pass has been glued shut by Gorilla Glue and Flex Tape.
Father Time himself has prevented you from doing time travel, and at the end of your lifespan, he quizzes you about everything in your life. And if you don't pass, you get sent a new book.
You are forever stuck in Father Time Life School.
Anyway! That's my advice! :)