Remember people's names, remember the names of their children and their spouses. Ask how they are doing, in general most people care far more about that then whatever their company does.

Smile more often (you don't have to be grinning ear to ear, just any facial expression that has a modicum of happiness).

Touch base with people whenever possible.

If you're a naturally inwards looking person that likes listening more than talking you've got half your problems solved, all you need to do is start asking questions and be sincerely interested in what they have to say. The only thing people love more than talking about themselves is having someone to listen to it.