Some members added info on this sticky thread on our survivors of suicide forum -
What to do if you are alone and thinking about suicide -
http://neurotalk.psychcentral.com/thread4982.html

one tip is
[Coping with a Crisis

If you need immediate help or if you are having thoughts of death or suicide, call
1-800-273-TALK (8255) or if you need immediate assistance call 911
or go to a hospital emergency room.]

but there is a lot more info too.

here is the main link to our SOS forum - it's not only for survivors -it's for anyone in that "place"
http://neurotalk.psychcentral.com/forum29.html