So after you've adjusted your guitar's truss rod you can now set the action, or height of the strings. This is where you really get to customize the feel of your guitar. If you haven't already adjusted your truss rod, or checked to see if it needed adjusted, check out part one of this series here: How to Set Up a Guitar Basics: Pt 1 - Truss Rod Adjustment The string height (distance between the strings and the frets) is adjusted at the bridge. On Fender style guitars, this is set by individually adjusting the height of each bridge saddle via the little set screws in it. Use an allen key to turn the screws, and try to keep the saddle level as you raise or lower it. On a Gibson style guitar, the string height is set by changing the height of the two mounting posts, which is done by either turning the posts with a screwdriver or turning the thumbwheels on the posts, depending on the type of bridge. Now you could just go and randomly start raising and l...