Read the material available on the preparation and submission of the outline and professional report. This advice should really be self-evident. However, a surprising large number of submissions are incomplete or are in an unacceptable format and require subsequent revision despite acceptable content. Provide yourself with plenty of time for preparing the outline and report. The preparation of a good quality professional report requires considerable time and effort.
Most people underestimate the amount of time that it takes to write a report.
Take your best guess at how long you think it will take you, and then, if you are like most people, double it. This should give you a more realistic idea of how much time you will need. Pay attention to the submission deadlines for outlines and reports. It will save you late fees and also should provide time for a revision, if necessary, before the next opportunity to write the registration exam. If writing is a challenge for you, seek help early.