The approach
Start with the right question.
Record date, location precision you are comfortable sharing, species, method and what actually happened.
In practice
Make it useful on the water.
Separate measurements from interpretations and mark uncertain details as unknown.
Keep learning
Connect the dots.
Use this guide as a starting point, then compare it with the water you're fishing, the tackle you're using, and your own observations. Good fishing knowledge grows through real practice.