Book excerpt: One Sentence a Day is the perfect way of documenting the happiest moment you have every day in this handy, pocket-sized journal. The value of rediscovering today's experiences at a later occasion has been scientifically proven to improve your overall happiness. Finding the most meaningful moment of each day and jotting it down; whether it's a conversation, a lyric, a line from a book or even an image, will help you build a bank full of memories which you can rediscover for years to come. Reliving these forgotten memories will give you an instant pick me-up and a lesson in appreciating the significance of every day moments of happiness.