There is an informal forum Etiquettes which all seasoned forum users adhere to, please add whatever you consider good manners when you visit a forum for the first time, on top or my list are:
Introduce yourself
DO NOT SPAM (at least for the first 6 visits)
Post to the appropriate thread/forum
Introduce yourself
DO NOT SPAM (at least for the first 6 visits)
Post to the appropriate thread/forum