Make sure she has enough to entertain her, she's gone to the bathroom, and has enough to eat/drink before you leave.
I would suggest training her. With that I mean leaving the house and sitting outside for say .. five minutes and then coming back in. When you greet her rub her head, smile, say "Hi, [insert name]" in a cheery and happy voice" and then walk away. Don't baby her or give her more attention then she needs. Then later on that day go somewhere else for a longer period of time. Come back and do the same thing. Make sure not to make a big deal out of leaving. Rub her head, tell her goodbye, and leave. That's it. Come back, give her a good hello, and go about your business. It's all about teaching her that you will be coming back and she can count on you to always be there for her.
at 5:43 PM on Nov. 5, 2010