Guitar ?'s

what 340 dart said, dont be afraid to mess around with your guitar you learn by trial and error just like working with cars, a few simple rules
1: mark all wires before taking any thing apart
2: make one small adjustment at a time
3: tightening the truss rod counter acts the tension the strings put on the neck
4: always check the neck first then adjust the bridge
5: string height is a matter of personal preference,as long as it doesnt buzz set it to what feels good to you (this is one reason no one else can ever set your guitar up as well as you can)
6: intonation, a string MUST be in tune at the 12th fret exactly one octave higher then when played open, or you will never be in tune, this is adjusted at the bridge by moving the string saddles further or closer to the nut, there is usually a small screw at the back for this purpose, (an electric tuner helps here)
remember make small adjustments and take your time once you get the hang of it you will be amazed at how much better you can make even the cheapest guitar play