Whenever I apologize to someone I always try to make it sound heartfelt and sincere. I believe the best way of sounding heartfelt and sincere is the employment of a giraffe sock puppet. If you don't own one, ask the person to whom you are apologizing to simply imagine you have one on your hand. You should also warn them that the giraffe is a bit 'bitey'. Just in case your apology isn't good enough for them.