No nose rubbing! They have no clue what that's all about. When they're this young, you have to do most of the work. After eating, get your Sadie in the habit of napping quietly for a few minutes, then play with her for a few minutes, then take her to the door and have her sit, then on to the outside and tell her to go potty, or whatever phrase you want her to learn. Praise her lavishly when she goes, and be sure to let her stay out and play for a few minutes after she's done the deed so she won't decide that the fun's over after she goes.
You'll want to watch and see what kind of schedule her system works on so you can take her out in between feedings, too. Her kidneys will be pretty active at this stage in her development, so you may need to take her out every 2 hours - or even every hour and a half.
I really, really wish I could remember whose idea this was, because it's a great one and they deserve credit for it: one member was having problems with accidents in the house so she started scolding the accident! Her dog got the idea that the accident was a bad thing, and stopped having them in the house!