Why I Still Write Thank You Notes by Hand
My wife thinks I'm crazy but every time someone does something for our family, I sit down with a pen and write a real thank you note. Not an email. Not a text. Takes me 10 minutes max but it shows respect for their time and effort. My kids see me do it and they're starting to understand that actions and words matter. The older generation still talks about the notes I've sent them. That's leadership in the small things.
Hand written thank you notes are classy. Your wife will get it when she realizes how much people appreciate that effort. It's a lost art honestly.