Being a fairly new player myself I've made a few mistakes along the way. Usually people are kind enough to point you in the right direction, and we learn from our mistakes.
I've had a couple of un-cool things happen to me over the past couple of days, and I'd like to share them in hopes that it will help to make the game enjoyable for everyone. I notice that it happens more frequently on the lower levels, so it's more forgivable than someone that's been around awhile.
Un-cool item #1 - This is an MMO...and a lot of people are working on the same quests. If you see a guy fighting a powerful adversary next to a flashing blue console, "Don't sneak in and click on it." I was there first and it's not your turn. This is considered stealing. In some countries they cut off your hand for theft. Very un-cool.
Un-cool item #2 - See un-cool item # 1. During heroic missions wait until the first group has finished the fight before you activate the console. Too many times have I been near death only to have the boss re-spawn and finish me off . It's only common courtesy, so please be courtesies.
Item #3 - It's not really an un-cool item, but it also stems on being courtesies. "Buffs" If you receive a buff from another player it's usually customary to return the favor. If you don't know how to do it. All you have to do is click on the player and hit your buff.
Thanks for reading and may the force be with you.