Maybe only an hour the first day, two hours the next, until the child is comfortable remaining in care the full day. Reinforce a sense of trust with your child - Young children's separation anxiety is often closely tied to fears of abandonment. It is important that they will know that you will be returning for them at a designated time. It may also be helpful to discuss with your child where you will be and what you will be doing during the time of separation. In any case remind your child that you will indeed return.
Many parents find that an object that helps the child remember the parent is of great benifet.
Communicate with the caregiver - They are your greatest ally in making the separation a smooth and calm experience. Be sure to let them know if you have any specific concerns and needs. Don't be afraid to specifically request their assistance or guidance. When it is time to go, say good-bye and go. Continued extensions to the separation seem to only add to anxiety and make the separation more difficult.