1. Consult your veterinarian to get a correct diagnosis of separation anxiety.
2. Practice leaving your dog alone for short periods of time.
3. Gradually increase the amount of time you stay away.
4. Avoid overly emotional good-byes and greetings.
5. Keep your dog confined in a safe area while you are away.
6. Exercise your dog for an hour each day in places other than your yard or home.
7. Praise your dog often to build self-confidence, rather than punishing her for exhibiting frightened behaviors.

via ehow