Time period to stop certain drugs before surgery

Aspirin: stop 1 week before surgery (Remember 'A' is the 1st alpahabet)
Lithium: stop 2 weeks before surgery (Remember the alphabet 'L' is formed by 2 straight lines)
MAO-A irreversible inhibitors: 3 weeks (Remember, turn 'M'clockwise, you get something like '3'; Alternatively MAO has 3 letters)
Estrogen pills: 4 weeks ( 'E' is formed by 4 straight lines)