I'll add one: (though I'll admit, because of where you posted this request, I'm slightly off topic 
)
When replying to a message with a quote, please don't mix your own responses into the original quote box without in some way highlighting your responses so they can easily be differentiated from the original content you are responding to!
It's maddening to have to re-skim through the whole thing again and figure out where each thought of the original post ends and then transitions into the responses. Please use bold, italics, change the text color, background color (that looks like highlighting) anything (not all, just anything would be fine) to make it easier to read your responses.
Even better would be to learn to break up the quote box, but I will admit that's not as simple as it should be, so I won't ask for that. Small steps!
-Dave
