I listen like mad to any conversation taking place next to me just trying to hear why this is funny. Women's restrooms are especially great. I wash my hands twice waiting for people to come in and start talking.
I think it's easiest to teach by example. My dad didn't tell us to work hard we just saw how hard he worked. I know I have shortcomings - like a short fuse - but I've learned you can't come home from a long day of work and snap at the kids.