I passed today the OCP JP exam. The path I've taken was to read the K&B Study Guide (a big thanks to the authors),
do some Mockup Tests (Examlab, Certpal, Whizlabs ...) and write small programs.
If I hadn't broken the golden rule to "sleep well before the exam" maybe I would have come closer to 100% .
Hope I can use my new skills in day to day programming.