I'm more or less in consensus with the others. I will supply one general SC tip: Particularly in RMDC, many strippers will do their best to give constructive criticism as they see it. Some may come off anal (mine probably would) whereas others will be of the "great job," "keep trying," or "you totally suck" variety. Different strippers have different mentalities about what's funny and will give a wide range of advice. I find that one of the really redeeming aspects of SC; you'll never find a more varied group or a wider range of advice.
Though some people's standards may seem insane, I think the general spirit is one of helpfulness. The less you let yourself feel defensive, the faster your comics will improve.
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The woman said, "Sir, if you were my husband, I'd poison your tea." Churchill replied "madame, if you were my wife, I'd drink it.