There are a number of things you can do, as a player, to make the game easier, more fun, or to totally thrash yourself. Here are some of them:
Double Binding is a common technique in which two keys are pressed to turn around quickly.
Are you tired of smart cam? Don't like in-cam? Wouldn't you like to have your own cam?
Camera Glance Keys
Use them! By default they are bound to the arrow keys.
Effects and Display
A Guide to video display and effects.
Pure grind, aka Digging
Prevent others from getting behind your wall and out of your box!
The most straight forward way to take the enemies zone from a circling defender.