Here's a good drill to learn how to accelerate the clubhead during the swing:
Swish Drill from Grant Brown Golf on Vimeo.
Here's an important component for hitting consistent greenside sand shots:
Greenside Sand Shot Weight Distribution from Grant Brown Golf on Vimeo.
Overview: It was a nice day with the temperature about 70 degrees and 10 to 20 mile per hour wind. I teed off at 12:20pm and the greens were firm…