Use Your Bunkers Wisely!

This tactic is great for bunker to bunker fighting.  It is best when you are protected from other opponents, and you only need to be concerned with one opponent in a bunker, but is good in almost any situation.  Usually, bunker to bunker fighting is very dull - pop up, fire, duck; opponent pops up, returns fire, ducks; and usually it goes on like this until someone makes a lucky shot.