Treat the children as individuals

You may subconsciously be helping sibling rivalry if you ever say things like, "How come you donīt wake up on time? Your brother never has trouble with that." Do not compare the children with each other - each one is a unique individual, with his own strengths and weaknesses. If you compare them, then the children will strengthen their own comparisons, and dislike whatever seems to be unfair in those comparisons. Praise a child based on his own activities and actions - not how he compares with a sibling.