As with any other kick, you should always have a target in mind.
The hook kick is a really good setup for other tricks. Try to add a hook kick in front of any trick and see how it changes it.
If you're not that flexible, try to lean away from the kick more, to kick higher - and then get more flexible!
You can add a hook kick to the end of most trick to make it "hyperhooked". Tornado + Tsunami = Cheat 720 Double Pump.