Most people allow themselves 3 - 4 months to prepare for Section 1. Following the announcement of the results, there will, typically, be a further 3 - 4 months to prepare for Section 2.
Everybody has different revision techniques, and favoured texts to prepare for Section 1, but most find it helpful to go through as many practice MCQs as possible. It is essential to spend time with your family / friends and ensure that you divide your free time appropriately.
Viva practice is essential when preparing for Section 2. By now, you will have most of the knowledge you need to pass the exam, but should spend time on improving the delivery of your answers. Many people find it helpful to work as part of a study group. Video conferencing, using Skype, allows you to practice vivas and discuss areas of uncertainty, if you do not live close to others sitting the exam. Ask Consultants, and trainees who have recently passed the exam, to give you mock vivas, and consider spending some time with radiologists, oncologists, nephrologists, histopathologists etc. to refine your knowledge of topics in which you may be weaker.