1. Use an approved solar filter (at least 16 stops) over the camera’s lens except during totality during a total solar eclipse. B&H Photo is a good source for expert advice on solar filter.
2. Use a tripod.
3. Shoot in raw format (not jpg) for better image quality.
4. Use a remote or set the camera on a timer to take images to avoid camera shake and to enjoy the event (be aware the sun will shift position, so you may have to adjust your view).
5. Learn the manual settings of your camera for better results than with automated settings for exposure, etc.
6. Practice beforehand to familiarize yourself with the settings you will be using.
7. Use the bracketing feature of your camera to take photos at multiple exposure levels to help get the right shot.
8. Learn the white balance function of your camera.
9. During a total eclipse, during totality, take off your eclipse glasses and enjoy the experience! You will need to remove the solar filter from your camera lens to photograph during totality.