What kinda bridge you have?

If you have a les paul style, turn the little screws on the bridge with a screwdriver, if you have a strat style bridge, same goes. With a floyd rose you need to loosen the strings and get at the screws infront of the saddle with an allen key and move the back and forth.
Jackson RR3 with EMGs!
B.C. Rich KKV
Yamaha F-310 Acoustic

Digitech Bad Monkey.

Peavey Valveking 112
This thread tells you how. Just scroll down to where it says intonation
[quote="'[VictorinoX"]']Just because a daewoo dealership has a tune-up service doesn't mean that the ****ers know what they're doing (no offense to anyone who drives a daewoo. pleas don't torture your little one cylinder engines to mow my lawn and bump into me)