What is generally accepted method or writing a good song? To start with the hook and let the rest of the song point to it, or start from the beginning and let the hook come naturally? Is there a "best-practice" stated somewhere?
I can point you to a very good resource on hooks in songs, whether you are talking about lyric or musical hooks. The resource is the great (albeit older) book, The Craft of Lyric Writing, by Sheila Davis.
The book is filled withe examples from real hits and other songs which have been produced by actual recording companies.
The author touches upon the entire process of song writing and how the hook impacts the song and how the song impacts the hook. Also, explains the importance of a hook is actually based in the audience's memory. In other words, you create the hooks to help the audience (whether listener or producer) remember your song. Good luck.