Organize your office supplies before you begin working so that you won't have to stop working to search for a stapler or a pen. Prepare your family. One of the advantages of working from home for a parent is some of the costs of child care can be saved. Getting the kids involved in your work can lessen interruptions. Give them junk mail for cutting and pasting.
Older children can learn to file and answer the phone in a businesslike manner.
Continue to dress for success. Staying in pajamas all day can psychologically take away from a sense of being at work. This doesn't mean you need to put on a business suit each morning. Just getting dressed neatly and comfortably each morning can help get you started on time. By mentally preparing to go to your office, you can stay focused.