I know that verse 12 is the most famous from this chapter - maybe from all of Proverbs - but verse 7 jumped out at me:
Stay away from fools, because they can't teach you anything. Proverbs 14:7 (NCV)
People often think they are being very biblical when they say you shouldn't make judgments about people. That is not what the Bible says. We shouldn't judge, as in condemnation - but we are told to make judgments about who is a fool and who is an angry, arrogant, wicked person - and other judgments - in this chapter alone. The Bible says stay away from fools and don't be one yourself.