I have compiled here a series of other history handbooks that you may find useful. I did find them useful in various ways in preparing this handbook for you. Feel free to peruse and find additional expertise and advice, in no particular order.
- Hamilton College History Department: "Writing a Good History Paper"
- Harvard University: A Brief Guide to Writing the History Paper
Additionally, consider purchasing a copy of Mary Lynn Rampolla's A Pocket Guide to Writing in History, which specifically addresses many of the points made here in more specific and detailed fashion. There are several editions, choose the most recent available.