If  you  open  it, CLOSE  IT.
If  you  turn  it  on, TURN  IT  OFF.
If  you  unlock  it, LOCK  IT.
If  you  use  it, TAKE  CARE  OF  IT.
If  you  break  it, REPAIR  IT.
If  you  can't  fix  it, CALL  IN  SOMEONE  WHO  CAN.
If  it's  not  yours, DON'T  TAKE  IT.
If  you  move  it, PUT  IT  BACK.
If  you  borrow  it, RETURN  IT.
If  it  belongs  to  someone  else, GET  PERMISSION  TO  USE  IT.
If  you  don't  know  how  to  operate  it, LEAVE  IT  ALONE.
If  you  make  a  mess, CLEAN  IT  UP.
If  you  can't  do  better, DON'T  JUDGE.
If  it's  none  of  your  business, DON'T  ASK  QUESTIONS.
If  you  can't  say  anything  nice, DON'T  SAY  ANYTHING  AT  ALL.
If  you  promise  it, KEEP  IT.
If  it's  your  fault, APOLOGIZE  FOR  IT.
If  it  doesn't  concern  you, DON'T  MESS  WITH  IT.