The area from 150 yards and in is called the scoring zone because by far the majority of golf shots come from inside that zone, so having good irons and working on this part of your game will have the greatest effect on your scores
Usually you want to splash your ball and the sand out of a bunker, but when the ball is buried this will cause a skull, so in this situation you need to use your sand wedge to dig below the ball
In order for your legs and buttocks to fire correctly during the swing you must increase the circulation in your feet so that they do not inhibit these important muscles