Flattery (as opposed straight and well deserved praise)

Flattery is inappropriate. Don't flatter anybody and don't let anyone flatter you. Avoid unfounded praise; it is pure flattery, and is so perceived by everyone.

When dealing with your superiors or with distinguished people, do so politely and as befitting and proper. Do not resort to flattery.

If you cannot prevent others from flattery, ignore them and don't be influenced by their attitude.

Don't let flattery cloud your judgment. Remember, flattery is unreliable as is meant to find favor with you by giving voice to things you'd like to hear even if they are untrue.