Here is Buddha's advice on right speech. This is very valuable in our daily lives as we become more mindful in our speech.
Summary of "Abhaya Sutta: To Prince Abhaya" (MN 58), translated from the Pali by Thanissaro Bhikkhu. http://www.accesstoinsight.org/tipitaka/mn/mn.058.than.html . Retrieved on 23 January 2013., 12 February 2012,
Abhaya Rajakumara sutta discussed by Ajahn Brahm