In a self-defense situation, you have three choices, the three "D's," you may either deny, delay, or defeat the aggressor.
Denial. You may deny the attacker by running away, blocking the attack, seeking protection, or removing the attacker's means of attack.
Delay. You may delay the attacker by involving him or her in conversation, running away and knocking objects in front of the pursuer, or use objects in the area to obstruct the attacker.
Defeat. Defeat the attacker by attacking and conquering him or her.