Preventing the Worst Case Scenario

I was hoping that I would be able to go to the store with my mom today.  She had to make a run and buy a lot of groceries, and I forgot to ask her if she could pick up some Acne medicine.  I don’t really have a problem with it, but I want to be prepared in case it ever hits me.  I want to be so ready that my skin is already used to the medicine, so it can’t even get Acne.  I guess I could just keep my face washed, and make sure that I don’t go to sleep with oily skin.