How do you arrange cushions on your bed so they look right?

Arranging them depends on the look you are going for. Sometimes just tossing a couple at the head of the bed and some at one corner of the bottom of the bed on a throw looks great for a casual feel. You can lay them from one side of the head of the bed to the other like dominoes lay after falling with the round one at the end of the bed. You can stand them up at the head of the bed with the two shammed ones up at the back, then working the size downward to the cylindrical one in the front keeping it symmetrical for a more formal look and one most people use (does not make it the rule). I like to stack pillows all different ways depending on my mood and not keep to one pattern...not so boring then. Anyway you place them that you like is the correct way.