Inspired by @maggieannre
  1. Kill me.
    I'd prefer you do this quickly and painlessly but that isn't strictly necessary.
  2. Carefully study my proportions.
  3. Using advanced 3D Printing technology, manufacture a Geoff-suit.
  4. Insinuate yourself into my family and life.
  5. Whenever the lights dim and the opening flourish starts when you're watching a movie, lean over to the person next to you and say quietly and nervously, "I'm scared. Are you scared?"
    This will 100% convince any member of my family that you are really me and go a long way toward glossing over the fact that you didn't know their names or where the bathroom was in our house.