How many times do you have to relive the same day over and over again? If it was a positive memory then the more times the better. But if it is a memory of something that hurt you then once is enough! It was bad enough the first time and why would you choose to relive it over and over again in your mind? It wasn't your choice to live it the first time but you can choose to "Just Flush It" out of your mind when it pops into your mind so you never have to relive it again.