Microsoft Word is … not my favorite … for a wide variety of reasons. However, the reality is that it’s also industry standard, and many many writers find themselves working in it during some (or all) stages of their process from idea to published work.
 
If you use Word, especially for longer documents (like, say, a draft of your novel), I urge you: Take advantage of its Styles tools.

I recently spent six months teaching revision strategies (and strategies for emotionally navigating the revision process) to creative writers across genres through the Loft Literary Center in Minneapolis. One of the resources I drew on and recommended to writers most often during those months was fellow Minneapolis writing teacher Elizabeth Jarrett Andrew’s book Living Revision: A Writer’s Craft as Spiritual Practice.