there's one aspect of professionalism that is vastly over-looked. that is kindness my loves. the saying for the mt program is "don't be an asshole." this is very important. especially in this industry. do you want to be a respected professional who people want to work with? then don't talk crap about your classmates, coworkers, professors, etc. behind their backs or in front of their faces. one word... RUDE. you will burn bridges. you will make enemies. you will lose jobs and opportunities that you cannot get back.
also.. just be kind in general. life is too darn short to hurt someone's feelings. we've all had those moments where our heart says, "ouch." everyone knows what that feels like. do unto others as you would have them do unto you. cliche, but true. have you ever realized that you actually have to go out of your way to be mean to someone? that's just wrong. don't do it.
be nice. you don't even have to love each other if you don't want to. just... be nice. simple.
ps. make a new friend today. it'll do ya some good. double pinky promise.