Set a objective of what you need to study. Make sure it is achievable in the time you have and you feel it is reasonable.
Find a place without distractions. The definition of entertainment can vary from person to person. Many people prefer a place entirely without the people around (eg a library), others do fine in the middle of a crowded room with headphones on. But the key is to find a place that you can not find distracting.
Before you start, make sure you have all the equipment you need. Nothing shell your study session than having to go home to get your manual.
Complete the first mission. When you study, make sure you do nothing else but study.
When the task is done, get a break. Do something that gets your mind off studying for exams. Some examples include talking to friends, surf the Internet or enjoy a snack. The goal is to recharge your mind before starting the next mission. Make sure you set a time limit on your breaks, or you may never end.
Return to step and repeat until all tasks are performed. Practice this technique a few times and you will develop successful study skills.