Just a lowly construction worker.

 Begin only when known where it can go wrong.
 Leave it better than you found it.
 If you don't know, don't answer.
 Sometimes the best answer is no.
 Avoid using first person pronouns.
 Don't waste people's time.
 Don't be snarky.
 Sometimes, be snarky.
 Do Not Feed The Troll.
 Respect others.
Top Answers