A good way to learn to study efficiently is to write down everything you do in a day and plan ahead. Second tip is to take some time to observe and learn from a person who achieve efficiency day in and day out. That serves as a motivator that an impossible task seems possible through efficiency.
Another important tip about studying is to find a quiet place. Some people stay in a dorm and sometimes there are just way too much distraction when you are trying to study.
Sometimes i find studying in a library doesn't really work. Although library is supposed to be quiet, but sometimes there are just way too many people walking around and actually causing distractions.