Concentration and Delaying Whistle

[CDurham]

Whats everyones keys to concentrating on play in your calling area? I find it hard to concentrate when the ball is close to my area. When looking for off the ball illegal contact I catch myself glacing in the direction of the ball to make sure it hasn't reached my area. Is this normal? I'm a first year official doing JV/Middle games in 2 man.

Also, I know one of the keys in our area this year is delaying our whistle for a split second to rule if contact was advantage/disadvantage.
-Is there any so called "tricks" anybody uses for delaying a call?

Thanks