How can I adjust the brakes on my bike for optimal performance?

To adjust the brakes on your bike for optimal performance, start by loosening the brake cable using the barrel adjuster. Then, squeeze the brake lever and tighten the cable until the brake pads are close to the rim but not touching. Next, adjust the brake pads so they are aligned with the rim and evenly spaced. Finally, test the brakes to ensure they are working properly and make any necessary fine-tuning adjustments.