Sirach 32-34

Some of the counsel offered still seems timely; for example, When you're in charge of an event, take care of the necessary tasks; You older guys can speak--but not too much; You younger guys, you can speak only if asked and not too much for you either; for all of you, Don't overstay at a party.

More wisdom that seems applicable to our time: A sensible person listens to thoughtful suggestions; Don't make the same mistake twice; Pay attention to the law; and Think before you speak.

Advice that may have fit their time but not ours is a section on how to treat your slaves so as to get the most work out of them. Further, the rules change when there's only one slave:

31 If you have but one slave, treat him like yourself, because you have bought him with blood. If you have but one slave, treat him like a brother, for you will need him as you need your life. 32 If you ill-treat him, and he leaves you and runs away, 33 which way will you go to seek him?

My cynical interpretation: Kindness can be beneficial.

Quotes from chapter 34:

17 Happy is the soul that fears the Lord! 18 To whom does he look? And who is his support?
24 Like one who kills a son before his father's eyes is the person who offers a sacrifice from the property of the poor. 25 The bread of the needy is the life of the poor; whoever deprives them of it is a murderer. 26 To take away a neighbor's living is to commit murder; 27 to deprive an employee of wages is to shed blood.