While my oldest is finally pee potty trained, she still refused to go #2 unless she's got on her night time diaper. So basically she holds it all day and will either go right before bed or right when she wakes up.
We've been trying any bribes we can think of - the latest is that she will get to go to Chuck $ Cheese.
A few days ago she did produce on the potty. We made a big deal out of it and I told her that if she poo'd on the potty again tomorrow Daddy would bring her to Chuck $ Cheese.
Now every time I ask her if she wants to try to poo on the potty she tells me "But you said I had to go tomorrow mumma!"