What are signs that someone may commit suicide? What are strong indicators that they may be serious? What tips may we find from the Bible that can help people deal with suicidal thoughts?

Extraordinary

Right now, there are hundreds of radio frequencies in the air, hundreds of television signals all around you. But, you don’t hear them all. The reason is that you’re not tuned in. If you tune a radio or television to one of those frequencies, then you would pick up the signal.
 In the same way, God is constantly transmitting to us. He wants to lead us, guide us, protect us and give us insight. But too often, we’re not tuned to His frequency. You have to pay attention to Him and learn His voice. God doesn’t speak to us most of the time out loud. He speaks to us through subtle things.