Communicate
When you move into the professional level it becomes even more important to communicate on the field. Simple directions or alerts, such as 'man on' and 'turn' or 'you have time' make playing so much easier and become more important as the game speeds up at higher levels.
Communication is also asking for the ball all the time, no matter what position you play. At the same time though, once you get the ball give it to the player who is in the best position to create something. Give it to the player who can do the most damage with the ball. Often on a team there are two or three players, or maybe one, who you always want to have the ball at their feet. These are the play makers, when they are open, pass them the ball.
Watch players like Messi and Xavi for Barcelona. Both are play makers and combine cleverly with Dani Alves on the right side. Alves acts as support player, like a wall that Messi and Xavi can play off of and get the ball back when they are open again. Alves of course is a unique player, and can also get around in the wide areas and into the attack.
Communicate through how you play the ball itself, whether you play a hard ball into feet that tells the player they are under pressure or a soft pass to draw the player back to the ball.
-Soccer-training-info.com