(Must do) Familiarize yourself with OCAJP 7 exam process. The best place to get information about it is Oracle Certification Website or else you can also talk to our team members
(Must do) Whether you are at the early stage in your preparation or have you written 100s of 1000s of lines of Java code already, it is mandatory that you take a book relevant for this certification. We recommend OCA Java SE 7 Programmer I Study Guide (Exam 1Z0-803) (Oracle Press) & OCA/OCP Java SE 7 Programmer I & II Study Guide (Exams 1Z0-803 & 1Z0-804) (Certification Press)
(Must do) Other than a book, you would also need to appear in a reasonable number of practice tests. That will help you to assess your topic-wise preparation level and concentrate your preparation on weak areas. It will also expose you to a variety of OCAJP 7 certification exam questions and set the right expectations. In case you want to take a look at some of the sample questions you can try OCAJP 7 Sample Practice Questions.
(Optional) In case you are a self-learner kind of person but need a formal training, you can take OCAJP 7 Online Course in which you will get access to all the preparation training videos.
(Optional) In case you are looking for a comprehensive instructor-led training program for OCAJP 7, we do offer live online training for this certification that will help you to learn and build your concept. The live online training is imparted by qualified Oracle Certified professional trainers. This training has 100% Test Preparation guarantee.
(Optional) In case you need specialized training for key topics of OCAP 7 you can check out Training/ Webinars sessions available with Whizlabs.
(Optional) Register in a good OCAJP forum to post questions and discuss certification exam preparation related queries. This will be helpful for your study. One such forum is Coderanch

Start your preparation today by checking your current level of understanding, appear in free OCAJP 7 practice questions.

“By failing to prepare, you are preparing to fail.”

Benjamin Franklin