Sit down (in your ideal setting and at your ideal time, if possible) and prepare to read. Do whatever you need to do to minimize distractions during your reading session. (This may include putting your smartphone and other technology in another room.) Have paper and pencil available to take notes.
Read carefully, stopping and rereading sections you don’t quite understand. Be sure to look up words you’re not familiar with. This is important! Most of us are good contextual readers; that is, we can usually figure out what an unfamiliar word means based on the content around it. But in your academic, college-level writing, every word is important, and some words carry enough power to change the meaning of a sentence or to launch it into a whole new level of detail. Also, some words have different meanings in the academic setting than in our more casual everyday lives. When you hit a word you don’t know, stop, make a note in the margin (or on a piece of paper), and look it up. If you find that stopping to look up individual words is too distracting, you can make a list of all the unknown words you run into and then look them all up when you’ve finished reading.
Keep reading until you’re done. Don’t be distracted. If you begin to feel fidgety, stop, get up, and take a five minute break. Then get back to your reading. The more you read, the stronger your habit will grow, and the easier reading will be.