1. Be clear about your purpose for reading. Are you reading generally to understand what each writer has to say? Are you looking for something specific to support your paper? Are you reading literature where you have to experience the text, or are you reading for ideas + understanding?
2. Based on that, prioritize. No one expects you to read every single word of your long reading list. Use titles, beginning and conclusions, headings, topic sentences to help you identify what is important, and what sections you can skip / come back to when you need more information.
3. Take notes – e.g., keywords in the margins, or skeleton of ideas on paper, so I can reference. Everyone has their own method for processing text, but the quantity of reading can be overwhelming, so you should have something to help you fix it in your memory, and also make it easy to locate again when you need to look it up.
4. Contrary to @jessic323, the only time I read aloud is when I am so tired that the text is swimming before my eyes. Otherwise reading aloud slows me down, because my eyes can move much faster than my voice. Other bizarre tricks I use when I am tired of reading is to change my physical environment, or posture. (e.g. squatting on the table!!—it literally gives me a new perspective.)