Wisdom and Age-Old Advice

 

What kind of advice has gotten passed down through the generations?
>If you’re wondering what I mean by “advice”; I’m talking about phrases like, “you catch more flies with honey than vinegar,” “watched water never boils,” “early to bed, early to rise, makes a man healthy, wealthy, and wise,” and other tidbits of that nature.
>Is it useful, or vague?

What kinds of things are considered universal knowledge?
>Are they actually true?

How many times have your character’s contemporaries heard some of these?

Which ones are the most frequent?

Have any of them passed modern scientific muster?

Have any of them been thoroughly discredited?
>Are they still passed around?
>>Has their discredited status been widely spread, or has it been covered up?
>Do the people that pass them around do so only do so because they feel it’s the thing to say at the time, or because they actually believe it’s true?