A technique that's taught to pilots early on is the visual scan. Take small 10 degree sections of your environment and allow your eyes to focus on each sector, then move on to the next. The stop and focus allows you to understand and respond to a threat or object.
If you watch a pro pilot do this, you'd swear he or she is just looking. The head movements gradually follow eye movements, and it looks very natural.
It's served me well in the air, on a motorcycle or in a car, and while waiting for a train--condition yellow, all.
Oakleaf's #7 is a good one. Comes with training and conditioning.
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coati
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