Now this isn't your typical guide in the aspect it isn't going to tell you how to play as in, controls... no this guide is here to tell you how to act in this game... and how to play the best way.... like a human being.
WARNING THIS GUIDE CONTAINS ADULT LANGUAGE IF YOU DON'T LIKE IT, TURN BACK NOW AND CLOSE THIS GUIDE, DON'T START LASHING OUT IN THE COMMENTS STATED YOU DON'T LIKE SWEARING, YOU WERE WARNED

Basically... BE A ♥♥♥♥♥♥♥ HUMAN BEING..... if that's too hard for you to understand it's simple just follow these simple rules and you'll understand how to play more then just this game... but any game online where other players are abundant.

Generally you will probably either spend your time in various places around Eorzea or inside dungeons... now... both have the same rules you should follow

Remember that the people helping you clear that dungeon are real live humans... and just like you things happen to them aswell... maybe your healer isn't healing as fast as the healer in the last dungeon.. maybe he's tired, or depressed.. cut him some slack, you'd expect it too.... don't ♥♥♥♥♥♥♥ lie, you would get so mad if someone treated you like crap

next point, maybe they haven't done that dungeon yet, don't expect them to understand what to do or where to go..
no one likes it when you be oblivious to others feelings and act like a gigantic ♥♥♥♥.

lastly, remember that you can do all the classes on one character... so, maybe they haven't been a healer the entire time they've been playing, maybe their still getting used to the game... don't rage at the healer if you run off without them.. don't hate on the tank for losing aggro if you were attacking a different target then them...

and last but not least.... DON'T BE A GIGANTIC ♥♥♥♥♥♥♥♥♥♥, because no one likes a ♥♥♥♥.
besides, if you need a random person on the internet to write a guide telling you how to act on the internet, the hopes of humanity are definitely going down the drain.

Remember, don't be a ♥♥♥♥