I bought K&B and read it. I bought Mughal but haven't read it. Since I am concentrating only on exam right now, I was planning to have another book which is also exam-centric.
About mock exams, I would be trying all the mock exams provided with K&B. I will also check out mock exams available with Mughal book.
About the JLS and API doc, I guess it would be overwhelming for me right now and also JLS and API would also be covering topics which fall outside the scope of exam.
Anyways, these were useful suggestions and I would have really tried out these if I had plenty of time available.
I ordered exam voucher last week and I got one with expiration date of 4/2/2009. So I am trying to put my time to best use.