People defend their first opinion. Ask for their thoughts before you share yours.

Once somebody has said what they think out loud, they are invested in it, so changing their mind becomes a small public retreat rather than a simple update. Asking first means you hear what they actually believe instead of a reaction to your position. It also leaves them room to agree with you at no cost. Order of speaking decides a surprising amount.

In the next decision you care about, ask what they think before you say a word about your own view. Listen properly rather than waiting for your turn. If your idea survives, introduce it as building on theirs.