Any pills, guns, knives, should be removed for safekeeping. Never promise total confidentiality. Explain that you may need to discuss the situation with another individual in order to provide the best possible service. Verbally and non-verbally indicate your genuine concern. Be willing to discuss the suicidal thoughts and feelings of the individual.
Contracts can serve as a block to behavior.
Sounds strange, but it works. Refer the individual to an appropriate agency for assistance. Be willing to accompany the person to the initial contact session or intake. Support is very important. An attempted or completed suicide is always a traumatic experience in any setting.