While it may not be very philosophical, this advice has helped me a lot in social interactions. When I was younger I was very shy and introverted and had problems conversing with other people, specifically establishing or maintaining eye contact with the other person. Then I heard or read, probably on the internet somewhere, this advice: When talking to a person one-on-one always look into their right eye. Now when I'm talking to someone I always make the conscious decision to look into their right eye, and for some reason this calms me a bit down and drags me out of my shell making it easier to converse with people.
Interestingly enough, humans have a bias toward the left gaze - that is, looking people in the right eye. Here's a wee paper on the topic:
http://filecloud.io/7c0wqt2s