Irene's come up with a way to diffuse the daily arguments between her kids:
I have a 5 year old boy and a 3 year old girl who have become very competitive with each other. They argue about who gets in the car first, who gets in the house first, who gets dressed first etc. etc. This is also fueled by my 5 year old's desire to always be "the winner". I got tired of refereeing the matches!
Along their preschool teachers, we came up with "Choice" Day. On their day, the child gets to choose certain things like whether they get dressed first, which way to drive to school and what CD to play in the car (the choices of course depend on the points of conflict!). To keep track of choice day, I made magnets with a picture of each of them. I place that child's picture on our magnetic white board in the day that is their choice day. If there is any question about whose choice day it is, we consult the board.
As strange as this sounds, this has served two purposes: (1) to get rid of many of the conflicts that I was dealing with every day, and (2) to help teach my 5 year old to value other people and their choices.