Chasing and digging a line shot is one of the most exciting plays in beach volleyball. This video explains one of the techniques used by professional player to make a full length dive at a ball, but still maintain balance and control as they make the dig.
The laydown is a great technique to learn and it will definitely help you to make more defensive plays.
I learnt this technique from a good friend of mine who runs coaching sessions at Manly Beach. If you are ever in Sydney, sign up for a class at beachvolleyball.com.au.