Ehh. I'm no good at making friends so every day before school I tell myself to smile and not be sarcastic and not take everything so literally and not get upset when no one else is following rules 100% and also be nice to my Math partner but I usually end up doing it anyways. I guess be as friendly as possible.
Personally I dislike it when people say "Just be yourself, it's easy!" but it's pretty hard for me to do that and get along with my classmates. So, like I said earlier, I try to be as friendly as I can be while still being me, I suppose.