"I'm a failure" "I'll never make it." That's kind of affirmation we hear people say. To overcome this feeling of worthlessness you need to make 3 little steps that will help you discover genius within you.
1. You need to motivate yourself.
First of all, remember that great people learned a basic and essential quality you need to acquire: persistence. Very successful people failed many times, like most of us. But they get up right away and they begin again and again until they eventually succeed.
We can motivate ourselves by seeing result in our mind as if it has already occurred. Feel what you would feel if you have better grades. Name this feeling. Amplify this feeling until it becomes very pleasant. Now, you are going to add some new feelings upon this first feeling. Do you remember a time when you were really excited about something? When you have this excitemant in you, add it to first very pleasant feeling as if you put a coat of excitement over coat of 'very pleasant state'. Let this feeling of excitement diffuse in you and notice how you feel.
Notice how feel very motivated, calm and confident. And for a moment, you know that you will succeed in school. But something holds you back. You need to make this second step....
2. You need to get rid of beliefs that hold you back
Consider law of belief: whatever you believe becomes your reality. Once you understand and appropriate this belief in yourself, you discover that you can do many things and especially have better grades.