What are the best ways to fight imposter syndrome?

When my students get jobs in tech (especially FAANG level) there is this feeling like they don't deserve to be there. This causes their mental health to suffer pretty significantly. My current approach to helping is to just remind them that if they passed a companies technical assessment, they deserve to be there. It doesn't feel that effective.

Would love to know if anyone has successfully tackled imposter syndrome or has helped others through it. What works and what doesn't?