http://www.sirlin.net/ptw-book/prologue.html

That's basically a guide for competitive games, with principles that apply from quake to chess to tennis. It's quite a long read, but definitely worth it if you are serious in any competitive activity.

a little similar writing: http://www.fnatic.com/articles/565/Motivatio

The PTW articles were going to be featured in my blog a while ago but I forgot. I actually have PTW in physical book form =8-X

Here's another post on a similar issue