If you may need some helpful tips before you start writing, these strategies will help no matter what stage of the writing process you are in:
"Good reading is about asking questions of your sources. Keep the following in mind when reading primary sources. Even if you believe you can’t arrive at the answers, imagining possible answers will aid your comprehension. Reading primary sources requires that you use your historical imagination. This process is all about your willingness and ability to ask questions of the material, imagine possible answers, and explain your reasoning."
By the University of Kansas Writing Center & the Purdue University Online Writing Lab (OWL)
By the University of North Carolina at Chapel Hill Writing Center