Our language offers us many opportunities to display our wit, wisdom, and upbringing. Every interaction you have with another is a chance to show your true colors. When you speak to the next person you happen across, will you be profound or profane?
As they say, you never get a second chance to make a first impression. You also don't get to know who might be watching you, and if that anonymous observer is in a position to make your life easier or harder. Choose your words wisely.
On the same note, the mark of a person's character is exemplified by their interactions with people who do menial labor or offer no obvious advantage to them. It is a small thing to notice and acknowledge the hotel maid, or the restaurant busboy. And, if they are doing their job well, a kind word to their manager will go a long way.
Beware the person who mistreats others, for they view you as inferior, too.
Enjoy your weekend.