Marcus Aurelius, Meditations, 2.2: " Frame your thoughts like this -- you are an old person, you won't let yourself be enslaved by this any longer, no longer pulled like a puppet by every impulse, and you'll stop complaining about your present fortune or dreading the future."
WE all let your impulses get the best of us, and when someone disagrees with us we immediately want to debate them, when someone tells us something bad we get sad, when there are cookies in front of us we want to EAT them. In stoicism, controlling impulse is a very important aspect. Our minds should be in control not our emotions.
One way to start is by listening more. It is one of the hardest things to truly do. We all have strong political beliefs, religious beliefs, or words to say. But for today, just try to LISTEN more , and I don't mean just listen and not say words, but try to understand what the person is saying and WHY they believe what they are saying. Try to ask yourself, what life experiences of the person I'm listening to brings him/herself to this opinion. For instance you may have strong opinions on gun control, but listen to the other person or persons and try to understand what life experiences brought them to that opinion. Instead of asking the person do they believe in gun law or not, ask them "can you tell me what life experiences brought you to your opinion, like when you first thought about this in your family or ask a kid, or as an adult that led to you having this opinion." You don't have to change your mind on your opinion, but it will make you much stronger as an individual if you LISTEN and "put yourself in their shoes".