How to tune your Guitar?

This is by far the most efficient method of ensuring that your guitar is in tune with itself.

In order to begin tuning the guitar, you'll need a "reference pitch" from another source. Once you've found a source for this initial pitch (it could be a piano, a tuning fork, another guitar, or any number of other options), you'll be able to tune the rest of your instrument by using that one note.

Without a reference pitch, you can tune your guitar, and it will sound fine on it's own. When you try and play with another instrument, however, you will probably sound out-of-tune. In order to interact with other instruments, being in tune with yourself isn't enough. You'll need to make sure that your E note sounds the same as theirs. Thus the need for a standard reference pitch.

Now that we've got our sixth string in tune, let's move on to learning how to tune the rest of the strings.

1. Make sure your sixth string (E) is in tune.
2. Play the sixth string, fifth fret (A), then tune your open fifth string (A) until it they sound the same.
3. Play the fifth string, fifth fret (D), then tune your open fourth string (D) until they sound the same.
4. Play the fourth string, fifth fret (G), then tune your open third string (G) until they sound the same.
5. Play the third string, fourth fret (B), then tune your open second string (B) until they sound the same.
6. Play the second string, fifth fret (E), then tune your open first string (E) until they sound the same.
7. Verify the tune repeating all the passages and playing some simple chords like C Major, A Minor, etc., listening to the results.

Note: At first, it may take you five minutes or more to get your guitar in tune, but the more familiar you are with tuning, the more quickly you'll be able to do it. Many guitarists can get their instrument roughly in tune in about 30 seconds.