For a big writing project, lay out a schedule for the writing process. Divide the time between the start of the project and its due date into three basic sections: Preparation, Writing, and Editing. Preparation should encompass research, note-taking, and outline-making. Writing the paper itself may end up taking less time than the other parts of the writing process. Editing encompasses all of the rewriting you will do and the finishing touches you will make. Mark these divisions and the time you have allotted to them on a calender so that you can keep track of where you are and where you need to be in your project.
Brains usually work most efficiently when you are not distracted by your surroundings. Make sure your workspace is free of unnecessary clutter and that your tools (computer, books, notes) are within easy reach. Likewise, make the computer folders you have dedicated to the project easily accessible. Backup all computer work to ensure that it is not lost. In addition to whatever computer folders you have dedicated to your project, it will also be helpful to keep physical folders for letters, clippings, and other papers you may collect along the way.
You will also need to organize your thoughts and free your mind of mental clutter whenever you sit down to write. Put your classes, relationships, and everyday concerns at the back of your mind. Focus only on the task at hand. Brief breaks during long periods of writing will refresh your body and mind and will help you keep your energy funneled into your work.
First write the sections of your thesis with which you are the most familiar. This will give you a good foundation to build upon. Consider your professors and fellow students to be your thesis' audience. Write in a style that will be clear, but thought-provoking to them. Be very specific in your writing. Try not to leave the reader with unanswered questions. Address any arguments to your theories that you think readers might have. Don't repeat yourself in your writing unless you wish to add to a previously-stated idea. If you run into writers' block, try working on an easier task for a time, such as editing or creating your list of references.
Throughout the writing process and especially during the editing stage, consult your advisers and trusted fellow students. Ask them for advice and constructive criticism on your writing style and the soundness of your conclusions. They will be able to share thoughts from points of view you may not have considered.