Introduction and Summary - a brief description of the problem, a brief summary of the analysis, any further discussion appropriate at this stage, and a clear and concise statement of conclusions.
Analysis - should consist of the description of the statistical methodology used (in general), report and discussion of the results.
Use plots to display patterns and relationships graphically. These are far more effective than numerical summaries. However, avoid repetitions. Remember to include your primary results (estimates obtained, etc), as well as their discussion. Any lengthy tables of results may reasonably be relegated to an appendix.
Appendices are for necessary technical detail (anything reasonably required for results to be reproduced), which would otherwise clutter the remainder of the report. In general, the number of appendices should be kept to a minimum, possibly zero. In particular, there is usually no need for the inclusion of computing code.