Finishing school for philosophers

Epictetus, Enchiridion, Chapter 33:

1. Settle on the type of person you want to be and stick to it...
2. Let silence be your goal...say only what is necessary and be brief about it...above all don't gossip about people, praising, blaming or comparing them. Try to influence your friends to speak appropriately by your example. If you find yourself in unfamiliar company, however, keep quiet.
3. Keep laughter to a minimum...
4. Avoid fraternizing with non-philosophers...
5. [Moderation in food, drink, sex...]
6. If you learn that someone is speaking ill of you, don't try to defend yourself against the rumors; respond instead with 'Yes, and he doesn't know the half of it, because he could have said more.'
7. [Stay away from crude amusements...]
8. When you are going to meet someone, especially someone deemed important, imagine to yourself what Socrates or Zeno would have done in that situation and you won't fail to get on, whatever happens. When you are going to house of someone influential, tell yourself that you won't find them in, that you will be locked out, that the door will be slammed in your face, that they won't give you the time of day. And, despite that, if it's the right thing to go, then go and face the consequences...
9. ...don't dwell at excessive length on your own deeds and adventures...
10. And avoid trying to be funny...
11. [don't swear too much...]