Another tool to achieve likeability is to consistently project positive emotions and create the perception that you are happy and enjoying the interaction. The quickest way to make someone like you is to create the perception that you like them because they make you happy - this is of course much easier if you genuinely do enjoy social interactions.
he or she feels comfortable and happy on a moment-by-moment basis
It is very good advice to care about other people.
I'd like to add that I think it is common for the insecure to do this strategy in the wrong way. "Showing off" by is a failure mode, but "people pleaser' can be a failure mode as well - it's important that making others happy doesn't come off as a transaction in exchange for acceptance.
"Look how awesome I am and accept me" vs "Please accept me, I'll make you happy" vs "I accept you, you make me happy".
r/Fitness does a weekly "Moronic Monday", a judgment-free thread where people can ask questions that they would ordinarily feel embarrassed for not knowing the answer to. I thought this seemed like a useful thing to have here - after all, the concepts discussed on LessWrong are probably at least a little harder to grasp than those of weightlifting. Plus, I have a few stupid questions of my own, so it doesn't seem unreasonable that other people might as well.