It sounds like great advice, and it probably is in the right situation. I can tell you that at my current company I behaved in this way for years, and metaphorically, and sometimes literally, washed the dishes and went above and beyond to end up being pushed aside by office politics. When you treat the company as if it were yours or you were its CEO don't forget that it is not yours and you are not the CEO, otherwise you'll be in for a big wake up kick in the butt...