Actually BEFORE you drink that coffee...and believe me, I KNOW that is not easy....LET THAT PUPPY OUTSIDE! 

When I house train a puppy, especially a large breed like a Rottweiler , I like the largest kennel I can. HOWEVER, it must have a divider. That way you can limit the floor space until they have shown they are ready for more room.  A dog will not potty and poop where they sleep if they can POSSIBLY hold it. If your kennel is too big, there is still room to "GO" in one end and sleep in the other. Rotties grow really fast..... you will be moving that divider back in no time!

On a side note:  ..don't feel bad about using a kennel for your puppy. A kennel is a SAFE PLACE for your dog. The first days away from their siblings they may cry and howl. But with a blanket. maybe a replacement buddy (stuffed animal) and a radio (to mask noises) they will soon calm down. It is in a dog's nature to want a kennel to keep them safe while they sleep. Big enough for them to stand up comfortably and turn around is all they need. If you keep your kennel in the main part of the house, make sure that children know to leave the dog alone when they go to sleep in the kennel. When your dog is anxious about something they will learn they have a safe  retreat in that kennel.

When you take them outside, take them to the same place everytime. That sense of smell helps them to learn what they need to do there. Unfortunately, when they GO inside the house... it ALSO tells them what to do THERE. Make sure you clean that area really well. Spraying vinegar on the area after cleaning helps. I have even picked up the poop from the WRONG area and put it outside at the RIGHT spot to try to get things going in the right direction.

This DOES take time, patience and a LOT of repetition for them to get it right. A puppy has a smaller bladder than a bigger dog. So the bigger your dog gets.. the longer they can hold it. Also, they will usually figure out the pee part first.  However, just like potty training a human baby.... they can get busy playing and forget to go.... until its too late!  At the beginning of training, take them out a lot. Do NOT let them play outside until the puppy training is at least pretty much established. I believe that "muddies the water", so to speak.  Poop and pee outside... play inside. The first weeks of training I will take a puppy outside about once an hour... usually about 30 minutes after they eat.   Hey!  Remember... small body... food comes in... you have to make room!

Good Luck, you can do this!

Crate Training Video: