Train attacking with a numerical advantage and defending without one. Attackers must convert the overload before the defence recovers; defenders must delay and force the play sideways rather than diving in.
Mark a pitch about 33x17m with a full goal at each end. Run three waves back to back. First a player goes alone against the keeper. Then two attackers against one defender. Then three against two. Each wave starts the instant the previous one ends. Reset and run again from the other end, swapping which team attacks. Keep the waves fast so the overload has to be used immediately.
Overloads are the most common attacking situation in football and among the most frequently wasted. A team wins the ball, breaks with three against two, and somehow ends up with a wide player shooting from a tight angle while the spare man jogs behind him. The advantage existed for about four seconds and nobody used it.
Running waves where the attackers always outnumber the defence puts that problem on repeat. The 1v0 sets the tone: no opponent, no excuse, attack the goal. The 2v1 introduces the classic decision, which is whether to release the pass or carry a little longer, and the answer is almost always to carry until the defender commits and then release. Players who pass early let one defender deal with two attackers, which is the most common error at every level.
The 3v2 is different again, because now there is a genuine defensive structure and the ball has to move faster than a defender can shift. Dribbling into a 3v2 is how the extra man gets neutralised, and it is exactly what players do when they are the one on the ball and enjoying it.
Defending outnumbered is the half that gets neglected. The instinct when short-handed is to dive in and try to win the ball back, which removes you and turns 2v1 into 2v0. Delaying, staying on your feet, and forcing the attack toward the touchline is slower, less satisfying, and correct. A drill where you are always outnumbered is the only sensible place to build that habit.
Save it to your private drills, then change the animation, adjust positions, swap equipment, or drop it into a session block. Or start from a blank pitch and build your own.