There are a few things you can do to write and complete your dissertation in less time. First, make a schedule and stick to it. Set aside time each day to work on your dissertation and make sure you stick to that schedule. Second, break your dissertation down into smaller tasks. This will make it seem less daunting and will help you to focus on one thing at a time. Finally, ask for help when you need it. Don't be afraid to ask your friends or family for help when it comes to your dissertation.