What do I need to know to prepare for the arrival of a puppy?

We’re bringing a puppy home in 3 weeks. My wife and I raised a puppy 20 years ago, but we’re going to need to brush up on our knowledge and make sure the whole family is consistent with our approach.

Are there any philosophies or approaches that you find are better than others? Books? Is there a youtube instructional series that you find invaluable?

I’m looking for the basics: crate training, peeing/pooing outside, etc.

Note: It’s a mini labradoodle, and she’ll be 8 weeks old when we get her. Don’t laugh. I have allergies, and this is what my wife came up with.