We're probably all familiar with this, but I wonder if anyone has ever used it effectively. The technique originated in poetry, which may be cited as the justification for its existence, but I see it often enough in fiction writing. From my experience it gets just as many compliments (I like the alliteration here!) as it does criticisms (You have some awkward alliteration here.)
I have used it on occasion myself in places where I thought it was helpful. For example, if I had a sentence like "Alfred was furious." I might revise it to "Alfred was angry." because to me it pairs the subject of the sentence with his emotion a little more powerfully. Even that explanation feels a little forced to me, though. Sometimes I begin to wonder if the only reason writers use alliteration is just to prove that they know what it is.
Do you use alliteration? When have you found it to be the most effective?