For the peeing, I never had a problem with any of my black gals. They wake up, outside. You are playing and they stop showing interest in it, outside. They eat, outside. They drink, outside.......
And I make a HUGE deal about going outside too. "HEY! Ya know what???? Lets go OUTSIDE to poop and pee!! YEAH!!!!!" YOU are all excited about something like going outside. THEY are all excited because you are! Lab puppies get excited... they have to pee! OPEN the door and RUN outside!!! You might be in your under ware, in the rain or cold, but you are outside and the puppy pees. HUGE PARTY!!!!!!! YEAH!!! Everyone pooped and pee'd outside!! YEAH!!!!!
At around 6 months I start introducing "last call", meaning we are going to bed, last chance until morning. This morphs into last call before car trips. Which turns into a poop and pee on command. I still praise Sunshine, at 3 years old, for peeing on command. I can open the car door in any parking lot, point to an 'island' in it and tell her to go pee. She will run, squat while looking at me, then run back into the car. She gets big head scratches and fanny rubs for being the best pee'r in the whole world. Yeah, some folks look at me funny and the dog people think is a great trick. I've had folks ask why I didn't leash up to take her there. I would ask why? It is only a few spots away and she is supposed to go pee and come back, that is all. You have to love labs!!!!