This is exactly what I do, now that I've climbed out of the hole, I extend my hand to help others come out.

I'm very open about things that I went through, and it validates people's feelings, and hopefully gives them some optimism when they see it's possible to overcome this.

I've got a few of my friends to actually seek professional help (and it helped all of them, at least a bit). And the way I go about this is first telling of the issues I had, and then saying that every single person (even the most normal person) would have a lot to benefit from occasionally going to a therapist. I also compliment my friends when I notice change in their behaviour.

I'd love to be able to help them financially as well, but as a student that is not an option.