Tim Urban, in his Wait But Why blog, wrote an essay called The Tail End. Instead of measuring time by, well, time, measure it by the number of occurrences you have left. For example, if you’re 40 and your life expectancy is 80 and you read 10 books a year, you have 400 books left to read in your life. If you eat pizza once a week, that’s 2,080 more times you’ll eat pizza. Go on a nice vacation every other year? There’s only 20 more of those.