Tim, firstly well done passing, you're brave to fail mocks and write anyway.
Anyhat it's a little late for you now, but for others this might be useful.
Instead of submitting the whole exam and reviewing each question, cheat on some of the exams. By that I mean treat it like an open book exam, use your
IDE and use your API docs, even google.
Do this for the first few exams, you'll start to find the
pattern in the questions and soon you'll answer them without any help.
The K&B book you bought comes with an open book exam option, use that too and check the hints before the reference. Try to solve the problem, even if you go to your IDE and compile, this counts as experience and I find it's so much richer than merely cramming facts.
PS did you take SCJP 5 or SCJP 6?
Spare me some best wishes as I'm planning to write on Friday, else late next week.
But I wanted to make a post here regarding Whizlabs, so that others who are in the same boat might not be discouraged. I used Whizlabs and took a lot of their practice tests. I think I only passed 2 times when taking those and when I passed it was just barely. 
Most of the time I failed by 5-10 percentage points. 
I thought I would let everyone know so others are not discouraged if they're using Whizlabs. 
what is your score, if I may ask? Just to know what a score in Whizlab can entail in the actual 
