For suicide prevention and emotional crisis. When you feel you can't go on they will help you. Let others know the pain you're experiencing.
This site has the hotline numbers for all States in U.S.A.
OR
http://www.suicidepreventionlifeline.org/CrisisCenters/Locator.aspx
Australian Residents
13 11 14 is a 24hr crisis support - Australia wide number.