Join Study Groups
Try to find a very competitive group that really wants to learn a wide range of things, and want to get best results. You must also put in order the periods when your group is going to meet, and initiate a record on what the group will study for the period of each study meeting. This is important for your grades.
Do not Get Distracted
The most important thing is that you must concentrate only on your grades. Your grades should be more important than your meetings with friends, sport activities, and partying in any way. This means that you do not have to leave your home work at the last minute minute and if you will manage to do this you are going to get the best grades ever.
Have A LONG Term Goal
Maybe right now it is too early for you to think on what you want to become in the future, but if you can manage to set up on good target on what do you really want to do in your life then for sure your grades are going to become better and better. You may wonder why higher grades should help you in the future. Well there are so many great opportunities in life and so many good paid jobs that you could avail in future, and for that your education should be supported with excellent grades. Of course there is a chance that you will change your mind about your future profession, but whatever profession you choose, you must have impressive grades in your academic life, only then you can flourish your future.
Be Loyal To Your Dreams
I was also once a teenager. I know that I also used to be more dedicated to my needs than to my goals and dreams, but consider your dreams first than any other thing. Needs can be accomplish any time, like if you want to party? This is what we can do any time, if not today, and then might be tomorrow or day after tomorrow, but if you waste this precious time you will loose the most important time of your life which could have been better utilized to fulfill your dreams. I know that some of your needs seem to be so much fun for you like shopping in the mall, watching TV, hang out with friends, but these will not help to achieve your future goals. So, consider to work for your dreams fist, and then to your needs.
Ask Your Teacher for Help
Normally students hate to ask so many questions from teachers. I used to hate also to talk more than it was needed with my teachers as well. That is why you will never find a big row of students asking teachers for more training. This is the big mistake that all of us do. We have right to ask anything we want from a teacher because he / she is provided to be there to help us in any way. Teachers always want to make their student's better and better and they always feel more close to the students who are really interested in what they teach. So try to be closer with your teachers. They will love to help you and you will be lucky if you take some important information or guidance from them on a regular basis.