As moderators at JavaRanch.com, we’ve had the opportunity to read suggestions given by thousands of programmers who have passed the old SCJP, now called OCP Java SE Programmer exam. The following three suggestions are by far the most common:
1. Use a good study guide. (Notice us not inserting a shameless plug here.)
2. Take lots of practice exams. (Just like in this book. )
3. Write lots of code.