I highly recommend learning meditation. I meditate once a day for 15 minutes and it's worked wonders for my ability to feel well and focused. Personally I learned a cheaper and less cult like variation of transcendental meditation, because it requires little training, time, or even effort. A day without meditation for me now is worse than a day without sleeping.
I couldn't get in Lotus position, but this page at Wikihow helped quite a bit: http://www.wikihow.com/Meditate