Every AED needs a prep kit for emergencies.    This will enable you to prepare the patient properly for the AED.   
 
It contains ...
 
Universal shears - this will cut through clothing to expose the patients chest.
Surgical razor - for those gentlemen with a hairy check it will allow you to shave where the pads are going to ensure they stick firmly to the patient
CPR mask - for your safety when performing CPR with breaths if you choose
Pair Nitrile gloves - for your comfort
Towlette - to wipe the patient prior to applying the pads.
Bio hazard disposal bag - for cleanup and waste after the patient is taken to hospital.