Try this mock exam
http://www.akgupta.com/Java/mock_exam.htm And also Take Mugalson's SCJP 1.4 simlulator exam (Its a free downloadable from NET)
If you can hit more than 80% questions correct! You are ready to go for the exam.
Make sure you could give all correct answers for the simple questions in this page
http://www.javaranch.com/roundup.jsp Have you worked on the questions @ Dan Chisholm website.?
Just brush up with this link
http://www.geocities.com/sunjava4u/javaCertStudyNotes.pdf (exactly 2 days before the exam).
Have fun!! My Best Wishes!!!