Proverbs 27 - This chapter of Proverbs starts right off with some of the best known advice: Don't boast about what will happen tomorrow and don't brag about yourself. The first verse is restated in James 4:13-14 and the matter of trying to predict or assume the future is not something we humans can handle. Its always best to let someone else "sing your praises" than to try to draw attention to yourself. Note the use of the word "friend" in verses 6, 9, 10, 14, and 17 (NKJV). Friends have their God-given place in our lives.
Proverbs 28 - Notice how listening to God's Word and His answering our prayers are tied together in verse 9. Also note the importance of confession of sin in verse 13. Giving rebuke that is needed is better than giving insincere flattery, verse 23.
Proverbs 29 - A person can ignore God's warning but they will regret it in the end, verse 1. Disciplining a child is far better than letting him/her go their own way, verses 15 and 17. Verse 18 in the King James Version says, "Where there is no vision, the people perish..." That's true. God calls His disciples to "look on the fields" that are ready for harvesting, John 4:35.