Hmmm, best suggestion is probably that you should find a partner to practise wiggling with.
I disagree that "it's all in the hips" -- you may find it easier to think about your knees -- especially if you are standing "pulled up" --there will be no slack in your knees/legs to let you wiggle -- you need to keep "soft knees".
A lot of hip action is really driven by weight transference -- rather than trying to push a hip in isolation.
A cheats way may be to place you knees together with legs slightly bent, and then draw small horizontal circles with your knees -- which should necessarily wiggle your hips.
Lastly, if you're practising -- its easier to feel how your hips are moving if you place both your hands at the top of you pelvis and use your arm feedback to feel how you are actually moving.
Cheers,
SpinDr.
P.S. You could always buy a lady's styling DVD -- always good to watch how the experts wiggle
