Well now, these are types of things I was taught by my folks and was expected to know, but they're seen less and less nowadays. I'd like to change that. I call them "Southern manners," but really they're just simple rules of good manners and civility.
"A Gentleman combines the skills of manners, conversation, conduct and personal integrity all rolled into a seamless package."
"Good manners do not ask you to give up life, limb, personal health or significant amounts of money. Instead, it calls for civility and respect for others expressed in word and deed."
It's a small document - it won't take you long to read. I guarantee that if you follow these simple rules you'll not only make great impressions, but you'll always be welcome and well thought of by those around you. If these rules were the rule, not the exception, imagine what a nice place the world would be.