Fighting stigma
One of the most positive influences we can have is by fighting stigma. There is still a huge amount of stigma attached to suicide, and this can be further instilled by religious or moral teachings.
Some teens have given us feedback that when they wanted to visit a friend who had attempted suicide they were actively discouraged by some parents from doing so; although the same parents had been encouraging their teens to visit a young teen from their school who had been diagnosed with leukaemia. The teens couldn’t see how the situations differed but they were being given different advice.
None of us are perfect, and we all have prejudices, but it is so important that we allow our teens to develop their own attitudes to issues which challenge them, their friends and peers. This is particularly the case with suicide, where we often still see the young person who has lost their way and tried to end their suffering treated as a perpetrator rather than a victim probably most clearly highlighted in the continuing common use of "committed suicide" rather than the much less nuanced "died by suicide".