Following are some links that might be useful if you are looking for additional drills and tips

SoccerXpert - Soccer Drills, Soccer Tips, Soccer Articles for Coaching Youth Soccer
www.soccerxpert.com

Coaching Soccer 101 - Soccer coaching and youth soccer drills
www.coachingsoccer101.com

Soccer Drills - Soccer Tips & Drills to Improve Your Game
www.soccerdrills.com

Footy 4 kids - 100% youth soccer coaching
www.footy4kids.co.uk

National Soccer Coaches Association of America
www.nscaa.com

Soccer Coaching International
www.soccercoachinginternational.com