Found this article by Gary Ewer very informative. 

Packed with good hook ideas.

Check out Gary's website. 

http://www.secretsofsongwriting.com/

1.Rhythm hook. This is a hook that establishes a beat/rhythm combo upon which the song is built. This was a favorite of Stevie Wonder, who started several of his big 70s hits that way (“Superstition”, “You Haven’t Done Nothin'”, “Boogie On Reggae Woman”, etc.) But this can work just as well with today’s style of songwriting.

◾HOW TO CREATE A RHYTHMIC HOOK:

◾Start by keeping a beat (tap your foot, or slap your knee)
◾A rhythmic hook needs to be short, so sing (improvise) a short 4-or-8 beat rhythm that grabs your attention.
◾A chord progression that accompanies the hook will also need to be short, so create a 1-or-2 chord progression that sounds good when repeated. (e.g., C-Fm7, C-Bb, C-Eb, etc.)
◾Create a bass line where the end of the line connects smoothly back to the beginning. This line needs to have a catchy rhythm, but doesn’t need to be (maybe even shouldn’t be) the same rhythm as the other instruments.


2.Intro hook. While the rhythm hook uses a combination of various instruments, an intro hook is usually a melodic idea that gets established in the intro, then repeated over and over, appearing, then dropping out. Good examples: “Smoke on the Water”, “You Can Call Me Al” (Paul Simon), “Moves Like Jagger”, etc.

◾HOW TO CREATE AN INTRO HOOK:

◾Improvise a short melodic idea (4-to-8 beats long) based on a strong, catchy rhythm.
◾Focus mainly on notes from the pentatonic scale (for example, in C major, use the notes C, D, E, G and/or A).
◾Create 3 separate chord progressions that will successfully accompany the hook. Those 3 should be able to serve as verse, chorus and bridge progressions.
◾Allow the hook to appear and disappear as your song progresses. Intro hooks are great, but can get tiresome if the listeners hear it all the time.


3.Background Instrumental Hook. When you think of Bob Dylan’s “Like a Rolling Stone”, you’re as likely to think of that catchy organ bit that happens in each chorus. U2’s “With or Without You,” which has that great chorus hook, also has a great instrumental hook: that immediately-recognizable guitar lick that happens throughout. Instrumental hooks are, in my opinion, one of the most important and under-utilized devices in a songwriter’s toolbox.

◾HOW TO CREATE A BACKGROUND INSTRUMENTAL HOOK:

◾With your song complete, create a short 2-to-4 beat lick on guitar or keyboard that has a distinctive rhythm, and that can be accompanied by most chords in your chosen key.
◾Concentrate mainly on using it in the chorus.
◾Works well in combo with other types of hooks.
◾Fit it in and around chorus lyrics, rather than on top of chorus lyrics. In other words, don’t pull focus away from the singer. Let an instrumental hook act as a kind of “answer” to a chorus lyric.