Avoiding WFH burnout comes from having an established work-life balance. Maintaining a routine throughout your day determines when you will and will not work. Structure your day as you would in the office. Similar to workspace boundaries, you also need mental boundaries.
Wake up, put on your work clothes, grab some breakfast, and organize your day with a lunch break. Keep your schedule focused on accomplishing projects and tasks during work hours. Furthermore, avoid pushing tasks into the evening. Imagine leaving the office as you would normally.