The first step in remembering anything is to register it. For example, a cheerful waitress approaches your table and introduces herself as Diane. You are engrossed in the menu. You didn't forget her name. You never registered her name.
Registration is a form of input.
If you skip input and don't put the fact into your memory because you weren't paying attention, there will be nothing to remember. Our inability to remember names, in most cases, is due to not attending in the first place. Thursday night is football night If you do register a name, fact or efficiently for future reference. This is called retention. When placing items in our memory bank for retention, we can't just toss them in - we need 'pegs' or other devices to help us store them all.