I would leave Samantha in there alone for 30 about minutes. When I first started, I would go open the door and she would be sleeping and not disturb her nap to come out.. That changed though to where she would just sit there and cry at the door the whole time wanting out.. When you get them at the door crying to come out... I think the point is getting to them.

For time out, they don't need a litter box, food or water or toys.. It should not be a holiday for them..(It's only 30 minutes!)