Sample Bagging System is used when you want your collecting decisions to be repeatable. With sample bagging system, you define what you are testing and what outcome changes your plan.
Before starting sample bagging system, choose the smallest area you can work carefully and safely. Define your spacing, your stopping point, and what counts as a meaningful observation. This keeps the method from turning into random wandering.
During sample bagging system, record both positives and negatives. A lack of finds can be just as informative as a hit, because it helps you narrow the productive zone. Skipping negatives is one of the fastest ways to fool yourself.
When you finish sample bagging system, label what you kept and note what you left behind. If you return, you want to repeat the successful parts and avoid repeating the unproductive ones. That is how a collecting method becomes site knowledge.