One rule I learned is that, sometimes you can get away with breaking the rules, and sometimes the rules are different between groups, and sometimes you're not even supposed to follow the rules.
For example - rule #4 is listed as "If someone asks if you like their new haircut--ALWAYS compliment it." This rule applies for probably most of the people most of the time, in most situations. But I had a job once at this autobody shop, and if asked that and you said "It looks really great", well, it wouldn't be wrong to say that, but, if you always followed the 'rules' like that, eventually you'd be ostracized. You were supposed to say something more like, "It looks like you used a palm sander, but you're so ugly it isn't the first thing anyone will notice." It was important to break the rules once in a while or they'd think you were phony and awkward - in that specific environment. The rules change quite a bit according to context.