Here is an excellent, short video that mostly is about cutting dovetails.
There is an astonishing quantity of b.s. propagated about dovetailing. So much so, that when I saw this, I decided to share it - - yes, I'm reblogging somebody else's work - - in the name of giving a boost to the good stuff so that the b.s. can begin sinking to the bottom.
Chris Hall's blog is worth following, too.