Kronda Adair presented on this topic last night in Portland to a packed room, and we had plenty of questions, so another informative talk. The slides are available online here at Presentate.
User: Most Common Mistakes of Website Owners (and how to avoid them)
Portland WordPress Meetup 
hi daniel,
thank you for posting the link to my evernote notes for the evening. i was just about to that here. here it is again, in a bitly short link for anyone interested — http://bit.ly/pdxwp-feb-2015-kronda.
best,
— faddah