One way to improve your concentration while studying is to jot down distracting thoughts on a list as they arise. This will remind you to deal with these issues later and free your mind to concentrate on the task at hand. If you put them off until last, you will be approaching them when your energy level is low. This will make the task take longer and compound your frustration. Getting the worst out of the way first may even energize you to get more done.
Study groups can be a great way to combat procrastination as well as an excellent study tool.
Students in study groups often find that working with other students motivates them to keep on top of things. Take advantage of all the resources available to you. You will find that professors, T.A.'s, the Tutorial Center, the Writing Center, the Counseling Center, and many other campus resources are here to help you do your best. Don't let uncertainty about an assignment get in the way of your progress. Vary subjects to eliminate boredom.