Create a "shutdown" routine at the end of the day. 15 minutes before it's time to leave, wrap up what you're working on and write your to-do list for the next day.
Use all of your PTO. In 2018, 768 million vacation days in the United States went unused. That is time you earned to take off. It doesn’t benefit you to not take it.
It’s so important to practice self-care and set these boundaries at work for yourself. It’s vital to all components of your health and well being. Please do yourself a favor and start today.