I hear you, and… — I have understood your point. The word and takes the place of but.
I see where you’re coming from. — Your view makes sense to me. My own view follows.
Help me understand… — A polite way to question a decision or an argument.
That’s a great point. I wonder if… — Praise first, then a different idea.
Have we considered…? — An objection offered as a question.
With all due respect… — The listener knows that a strong disagreement follows.