What Belongs at the End?

I am writing the last chapter of my dissertation and feel confused about what to include. While searching for guidance, I came across Help with writing dissertation conclusion chapter. I want to do the writing myself but need some simple direction. Should I include findings, limits, and ideas for future research? How do I avoid repeating the whole dissertation again? I would really like advice from students who have completed a long research assignment. What outline helped you plan a clear and useful final chapter?