An L.A. attorney who, for years, had experienced a lot of bad luck in his life heard an inner voice telling him to start writing Thank You notes.

John Kralik wrote a thank-you card every day for an entire year — to his daughter's piano teacher, a worker at Starbucks, and the lady who cuts his hair — and it changed his life.

He wrote a book, called, 365 Thank Yous: The Year a Simple Act of Daily Gratitude Changed My Life.

WATCH the video below from Steve Hartman via CBS…