[header] How to tackle [title] Maintain the proper position and tackling form. [step] Your head should be up and your eyes should be on the ball carrier at all times when you're playing defense. Your feet should be shoulder-width apart, with your knees bent and your shoulders back. 
Ideally, you want to have your back at about 45 degrees relative the ground. [substeps] This is sometimes referred to as " breakdown " position.