Originally Posted by: shaggy_bonezhow do I know where the notes on sheet music will lie on the guitar fretboard?

That is all covered in Guitar Fundamentals 2 Chapter 4 "Intro to Reading Music":

http://www.guitartricks.com/lesson.php?input=10272

There is a slightly tricky issue involved if you are trying to play sheet music written for piano and play it on guitar, however. :)

Guitar notation is typically written an octave higher than it sounds at concert pitch compared to the piano (and other standard instruments). This means that the guitar is a transposing instrument, because its notes sound one octave lower than they are actually notated on a score.

This helps in one sense because rather than have to read two staves (bass and treble) like piano music, guitar is usually only written in treble clef. Typically this issue is rarely even mentioned, though. And many times if you will simply play the notes you read on sheet music and play them on guitar it will sound fine.

The lessons in the course linked above will give you all the info you need to reading music for the guitar. Hope this helps!