Praise the child when does things you like. Wants to push the stroller. Likes to run around without shoes or clothes. Can indicate the child's needs. Biting can be a problem.
Most effective discipline is separation.
When the child falls apart, put the child to bed. Take the child's temperature. The child is probably sick. Can hold a glass with one hand but still has difficulty with a spoon. Is not interested in eating and becomes a poor eater.