I am a cynical person. When I read a book title like Practicing Affirmation I hear, “Tell people what they want to hear so they will feel better about themselves and, ultimately, like you more.” In reality, affirmation has very little to do with praising people. Flattery is praising people. Affirmation is praising the work of God in and through people.
Even with the Bible’s emphasis on humble self-denial and its warnings against pride, the Bible praises people—to the glory of God, ultimately. The chief end of God is not to glorify man, as humanistic thought would have it; the chief end of man is to glorify God by enjoying him forever. Meanwhile, the praising of people does not necessarily preclude the praising of God, if the people are commended ultimately for his glory. God is glorified in us when we affirm the work he has done and is doing in others.
Crabtree, Sam (2011-02-10). Practicing Affirmation (pp. 11-12). Good News Publishers/Crossway Books. Kindle Edition.
I would encourage you to read this book and see the value in the affirmation of others, yes for their good, but ultimately for the glory of God. His image and grace is displayed in the lives of those around us and we take every opportunity to point out his glory to them.