How can I achieve strong and precise jointing with a router?

To achieve strong and precise jointing with a router, follow these steps:

1. Use a sharp router bit to ensure clean cuts.
2. Adjust the depth of the router bit to match the thickness of the material.
3. Use a straight edge or guide to keep the router steady and straight.
4. Make multiple passes with the router for a clean and precise joint.
5. Practice on scrap material before working on your final project to perfect your technique.