arrange your time carefully.
make a schedule or a table for your time.
then insist on it.
you should set aside reasonable time for study,but study shoul't occupy all your free time.
entertainment will enable you relax both your body and your brain.
so you must be aware of the impotance of relaxation.
我按照你的意思稍微做了些改动.有些句子你写的还是不错的,但是很多地方用词不太确切.比如安排时间,用arrange会好些.做改动的地方如果不明白你可以问我.