Hi Shriveled Muse.

What exactly is taking away your attention and focus? Dig deep inside and find what is taking your focus away. Is it the Internet? Video Games? Friends? etc. w/e it is, find a way to study where that distraction isn't so prevalent, like a library or a quiet room somewhere.

If it's just your thoughts, then try meditating for a few minutes everyday to train your mind to focus. Meditating IS SO VALUABLE. Seriously. It's like a workout for your mind. Any sort of workout takes consistency and time for your muscles to grow bigger and stronger, so meditate and eventually your focus muscle and self-control muscle will grow and you'll get better at focusing. Meditating is easy and simply involves taking deep breaths, IN AND OUT. Focus on deep breathing only, and once your mind gets distracted (which will happen) and you notice, simply bring your thoughts back to deep breathing. Do this for a few minutes everyday and you'll become gradually better at focusing.

Another tip that helps with focusing is to SET TIMERS. Go on websites like e.ggtimer.com and set a timer for 5, 10, 20, 30, 1000 minutes or however long or short you want. Studies show that setting deadlines help to bring urgency and focus into our minds because the stakes are higher. Have you noticed how when the deadline for your assignments or exams approach, you become a lot better at focusing and studying than at the beginning of the semester? That's because of the deadline.
So utilise the power of deadlines everyday to help with focus.

Good luck mate.