The Field of Play For safety reasons, check the condition of the field, the integrity of the goals, the nets to make sure they are fastened to the ground, goal posts and crossbar prior to each game. Also be sure the nets do not interfere with the goal keeper. Tie up any gaping holes. Lines should be well defined, but are often times obscured by weather elements. Try to make certain that the penalty area and half line are well marked, as the other field markings can be interpreted using visual clues, the ref stepping off the distance, and the like.
All lines are in play.
A ball is not out of play until the entire ball crosses over the line. The ball needs to be inflated properly. Hold the ball head high, after dropping it should reach waist level. Roundness can be determined by tossing it in the air while causing it to spin. No wobble should be seen.