I'm not sure that I know how to properly appreciate the help if I were, I dunno, suddenly handed $50 million and a mansion and a staff. (Other than 'pay them like software engineers.' I bet that would make up for lapses in etiquette better than just an apology.) But I know to not ignore someone who walks over and asks you if you need anything, and I can usually raise or lower my formality level to meet the person I'm talking to even if I initially get it wrong.

(Actually if I were suddenly handed $50 million and a mansion and a staff, I'd sell the mansion, provide the staff with generous severance packages, pay down my mortgage, and start some kind of charity. But you know.)