I started studying superlearning. It sounded a bit esoteric at first. However, it makes sense to me that getting in the right mood before and during learning should help you learn more effectively. It can't be wrong to remember your greatest success or your happiest moment before you start learning. And then play some Bach or Vivaldi in the background to keep you going. Why not? There must be more to superlearning, though. Hence, I'll keep you posted as I learn more.