Now stop studying and go to bed. And listen to your mother. Because you're cramming. Sadly, trying to cram information into your head all at once doesn't work. You remember more when you study a little bit a lot of times, rather than studying a lot of information once or twice.
Procrastination is a terrible thing.
When you finally come to the sad realization that there really won't be an earthquake that swallows up the Psychology building, your test on chapters 3 to 2468 is only 12 hours away. Your body knows better though. Around 8 p.m., when you've just about convinced yourself that you'll pass the test based on your psychic knowledge, your body will go into red-alert. Now, instead of having too little motivation, you have too much. You can't concentrate.