Every time I work with a new search & rescue team I learn something new and sometimes the seemingly small techniques they take for granted are revolutionary to other people; such as, when I was in the Amazonian rainforest I learned that if you see a mosquito biting you, never squish it – this empties the contents of its stomach back into your body and can leave its proboscis (the needle it sticks in you!) buried in your flesh to go septic. Instead, sweep it away in a brushing movement with your hand.
Using a Lanyard to secure your Sat Nav
The Correct way to use Binoculars
Marking up maps using Chinagraph (grease) pencils and marker pens
Carrying and storing spare batteries