Your calendar defines who you are. What you value should be reflected in how you spend your time. If you say you want to get in shape or start a business, but spend each day on the couch, you are lying to yourself. The calendar, on the other hand, never lies.
You Are Your Calendar (YouTube video) by Tom Peters
Death Clock (extension for Google Chrome) – Every time you open a new tab in Google Chrome, this extension reminds you how much time you have left (based on your age and the current life expectancy stats)