As far as using questions in titles, go for it. If
the content is a Q & A type situation, then having
those questions in the title will be of great
benefit to your users. You may also find that your
AJ (Ask Jeeves) traffic will increase if the
content is of the type that users would look for
at AJ.
You'll also capture those exact phrase searches.
Google states that it ignores certain words in
searches such as how, to, from, the, etc... But,
I've seen different results returned with and
without the ignored words.
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