Some I try to bear in mine (some of which may typically covered by forum rules):
-try to give your position as succinctly as possible (elaboration can be given later if necessary).
-try to limit responses to no more than four per topic (this based on some recent research that determined that if your opponent is not persuaded by your arguments within four posts, you are unlikely to do so with further replies).
-try not to attack someone for a fault they cannot help.
(I'm certain I have some more, which I'll post if they come to me - I don't actually have them written in stone).
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