Do not fixate on the rear tire directly in front of you. Keep your gaze looking through or past the lead rider to anticipate road hazards and changes in pace.
Never let your front wheel overlap with the rear wheel of the person ahead. If they swerve or slow suddenly, overlapping wheels will almost certainly cause a crash. Adjust for Wind: Headwind: Stay directly behind the lead rider. My Bike
When it is your turn to lead, maintain a consistent pace. A common mistake is accelerating too hard when you hit the front, which can break the group apart. Do not fixate on the rear tire directly in front of you
Avoid sudden braking or jerky movements. Use gentle "feathering" of your brakes to shave off speed gradually. If they swerve or slow suddenly, overlapping wheels
Check that tires are inflated to the recommended PSI.