Everyone has their own habits in studying,this makes them become different in how to solve problems.Of course ,I also have my study habits,it may be the same as yours.I often study at early morning.If in day,there is too much homework,I will do exercises at night,then I learn by heart at early morning.At noon,I usually use my time by doing some exercises or learn to listen English,then I sleep about 30 minutes.Therefore,in the afternoon,I never feel asleep.I think my study habit still has its limitation,you can add or check it right.But I find that a best way to study is yourself way,just you find it easy with you .