A common mistake made by players using a weenie strategy is to stop attacking once the opponent gets out a bigger creature. If you have three creatures versus your opponent¹s one, attack even if it costs you a creature. Think of it as exchanging one card (the blocked creature) for the damage caused by your other two. In addition, reducing your opponent's life is the best defense for a weenie deck later in the game. If your opponent is down to about 6 life or less, he or she will become afraid to attack--one more breakthrough with your horde and your opponent is toast.