What's the best way to show appreciation to a neighbor who keeps a watchful eye and helps in critical situations?

Why might it be better to keep hurtful comments you overhear to yourself rather than sharing them with the person involved?
How often do adults learn they're autistic through events like burnout or a child's diagnosis, and what role does this play in their self-discovery?
How do the financial planning strategies for healthcare differ between generations, such as Gen X and Millennials?