Tuning Method #1: Tune to a Piano
We will discover that there are a lot of similarities between the way notes work on a piano and on a guitar. Look at the piano keyboard below:
We'll find the E note for the 6th string below middle C on the piano. If you don't have access to a piano, don't know where middle C is, and can't make any sense of the illustration, then this may not be the method for you.Locating the E below middle C, match that tone on your 6th string. Then work your way up to the high E on the 1st string.The problems with this method are 1) you need a piano, and 2) you need a good ear for matching the notes. So good luck!
