When I work in my home office. To be really productive. I have to close the door even tho I live alone, then LOCK it. Sometimes I will get up, walk to door

When I work in my home office. To be really productive. I have to close the door even tho I live alone, then LOCK it. Sometimes I will get up, walk to door and when I try to open it and realize it's locked. It signals me that I should be doing work, and I turn around and sit back down and keep working. If I leave that door open. I would just get up almost without thinking to walk around and I dunno, just get out of the office. Then it's 10hrs later and I haven't made it back in lost between the office and kitchen.