Take normal breaks

While you may sense it's best to study for as many hours as possible, this can truly be counterproductive. If you were training for a marathon, you wouldn't try and run 24 hours a day! Likewise studies have shown that for long-term retention of knowledge, taking regular breaks really helps. Everyone's different, so develop a study routine that works for you. If you study improved in the morning, start early before taking a break at lunchtime. Or if you're more creative at nighttime, take a larger break earlier on so you're ready to settle down come evening. Try not to feel guilty about being out enjoying the sunshine instead of hunched over your textbooks. Remember Vitamin D is imperative for a healthy brain!