You still gotta go to work, which means you need a spot.
Creating a physical space helps bridge the mental transition to the workday and sets boundaries for the others in the house.
Working from home full-time, or even just for a full day, is not the same as sending a couple of emails after dinner. You can’t do it from your bed or the couch, at least not effectively.
Effective working from home requires a mindset commitment to the workday, just as if you were going to the office. Having a physical space helps transition your mindset, just as your commute did before. Once you set those physical boundaries, your focus sharpens and you’ll have a better time ignoring interruptions.
At the office, everybody’s on the same schedule, but at home, the schedules clash. You can’t run your day interrupt-driven from your family and expect to be successful.
This may be your biggest challenge, but it’s worth sacrificing a spot in your house. Even if you have a tiny apartment, make a permanent spot that you can go to each day. Set up your big monitor and docking station. Layout your favorite pen and notebook. Leave this stuff there just as you would at your desk in an office.
When you go to this space and sit, you are going to the office.