I also agree with you Anna.What if some one is not afraid of negative results that will happen if he didn't study.Some times a situation comes like that they get much bored of studies and think they will never do study more without thinking of consequences that will happen.

Thanks for your precious comments.I also agree with you DJM that reward is a good idea but we should think about the rewards we get if we do our study well,just like to think about an appreciation you will get from your friends,family and others,or to think about your bright future etc

I agree with DJM that reward is a good idea. It also works for me but not always. To get motivated, I try to imagine the positive and negative result of it. For example, if I don't study, I cannot exchange my current situation (usually its not good.), so its quite dangerous. If I don't study, other classmates will look down on me when I cannot answer the questions, my brothers will kick me out of house, etc. They are surrounding impacts. In case you are not afraid of these ones, you may think of the other bad consequence up to you. Hmm, its hard to say since we are raised up in different environments. Maybe you can think of your target, your successful image you can achieve if you finish this task and keep going with it. Or you may help some weaker students like becoming a tutor. When you can talk and instruct them with what you have known, it may make you feel more confident and even pleased to come back with your studying. (I suggest this one since I guess you may feel bored with your studying due to disliked subjects or difficult problems) :P I hope that it is not too much information. well, hope that you can overcome this trouble soon. \\^_^//

For me, a reward is always a good idea, however small it is. For example, after I study this much I can eat some nice food, or I can watch my favourite TV program. Even after getting the motivation, distractions can be a problem.