Well,
My experience started with reading the book which was boring
Then I bought CDs and learned while practicing the questions
And then I tried a couple of website on the Internet to check my level and I felt I am ok.
Finally I went with my wife and we both made it the first time
But it doesn't end here:
I created a new website, very similar to the official test, but I will abstain from mentioning it to avoid Advertising.