A Little Tip: Want People to Feel as if You are Both on the Same Wavelength

Allow yourself to become infected by their emotional output.

In other words, if you see them excited because the home team scored a goal, make sure you get up in that excitement as well, make sure they see that.

If your counterpart is angry, allow your face to come close to matching his emotional intensity.

These kind of near matches really build empathy and liking between two people or groups of people.

However, don't match the exact level of excitement or anger. This can often backfire as being seen as  dramatic not genuine and overall bad idea.

Books about anger management