I used to have a lot of trouble leaving the office. And, then when I did, since I own my own private practice, even if I wasn't physically at my clinic, I would continue working at night. My laptop open on the dining room table, paying half attention to what my kids were saying - sound familiar?
So, the one thing you need to do? Create a work shut down routine. This one small routine will help prevent overwork. Because, there will always be more work to do. You will never be able to finish it all