1. **Use a GPS Device:** Invest in a reliable GPS device or a GPS-enabled fishfinder that allows you to mark waypoints.
2. **Mark Waypoints:** When you find a promising fishing spot, mark a waypoint on your GPS device. This will save the exact location for future reference.
3. **Label Waypoints:** Give each waypoint a descriptive name that will help you remember the characteristics of the spot, such as 'Rocky Point' or 'Deep Hole'.
4. **Organize Waypoints:** Create folders or categories on your GPS device to organize waypoints by location, species, or any other criteria that are relevant to you.
5. **Backup Data:** Regularly backup your GPS data to avoid losing valuable fishing spots. You can save waypoints on a computer or cloud storage.
By following these steps, you can effectively mark and save GPS coordinates for fishing spots, making it easier to revisit successful locations in the future.
This answer doesn't make sense or isn't related to the question. Mark it as a probable hallucination of the AI model.