Sometimes it is good to just go out for a walk.
Forget your mp3-player (or ipod), your phone, your pad, your money, just go. Take nothing with you but your keys. No distractions. Choose one direction and then head off. No turning back, stick with your way. Enjoy the noise around you. Go until your thoughts become clear. Embrace what you see, embrace what you hear, embrace yourself. Then, head back.