what camera are you shooting with? it definitely took me a while to get 'good' at using it (although i'm still really far from good).
a good thing to keep in mind is that it's not magic. it will help, but you have to put the time into making sure you actually know how to use it. support almost all of the weight with your handle hand, and lightly grasp the main pole to turn it. i see way too many people with a firm grasp on the central pole; that won't stabilize things at all.
we need duncan and steen in here, they could both give some great advice.