Josh61's idea caused me to have my own idea for how we (try to) stop new users posting low quality questions: compulsory multiple choice quiz!
It's very easy for anyone to ignore the guidance on the right hand side when posting your first question, just as it's easy to ignore a video. But if there is a compulsory multiple choice quiz, then they have to read it. (Or, at least, it being the only thing on their screen, and requiring input, there's a much higher chance of them reading it.)
My implementation concept is this: when a new user (maybe someone with 10 or less rep?) clicks "Post Your Question" they get taken to a page which says (bullet points represent radio buttons):
Have you provided as much detail as possible?
Have you included any research (e.g. what a dictionary or thesaurus has said) in your question?
(If they have selected a tag which has additional requirements, there would be additional questions. e.g. if they select [single-word-requests] there would be an additional question of "Have you provided an example phrase?")
If they click "Yes" to all, it proceeds to post the question. If they click "No" to any, they get a screen showing extended guidance on that subject, and a "Edit Your Question" button.
Yes there will be people who click "edit your question", do no editing, and just select "Yes" to all to make their question get posted. But, hopefully, it would improve a significant proportion of first time questions by making sure that people have read the guidance.