Right there with you, both my wife and I had massive struggles at work due to sleepless nights. Most importantly, be realistic. You're not going to be amazingl

Right there with you, both my wife and I had massive struggles at work due to sleepless nights. Most importantly, be realistic. You're not going to be amazingly productive, because you're busy building a family and that takes effort. It's temporary and worth it, and at some point those kids even start paying you back by mowing the lawn. The key is to not use this time to fall into a hole you'll need to dig out of later; stay on top of diet, exercise, and your health. Second, take advantage of the new constraints placed on you to make your life brutally efficient. Outsource everything that you can like cleaning and groceries. Get organized around various tasks like bills and taxes so you never have to think about them. Organize your home so that everything you need is where you need it and get rid of everything you don't need. Coordinate with your spouse to make sure you're both using your time the best. Before kids I was never very efficient, I was just highly productive because I enjoyed my work and threw tons of hours at it. In retrospect, I do wish I had invested more in becoming more efficient, but now a baby is a wonderful constraint to force efficiency. Good luck!