Guitar lesson: How to learn the guitar fretboard

With the conventional tuning on your guitar you will have the note E on the first open string. I guess you are aware of the fact that you can find the same note on the second string too. If you don't know on what fret you will find it you can listen your way through the frets on the second string until you'll find the note that sounds the same as the first string.

You will probably find out by yourself that E on the second string is on the fifth fret.  E on the third string is on the ninth fret. Practice to play E on these different places and jump back and forth until you can find the frets without effort.

In a similar way you can invent small exercises on you guitar fretboard like playing all E's on all six strings until you can play them with ease or finding all C's and play them consecutively like a picking exercise or as an exercise for your right hand fingers.

Knowing the notes on the guitar fingerboard will be a great help for you, not only when playing guitar sheet music but also when you are playing by ear or improvising a guitar solo.