The easiest and most accurate way to tune your guitar is by using an electronic tuner. An electronic tuner allows you to are sharp (too high in pitch) or flat (too low in pitch).
If you have an electric guitar you tune each string individually to the tuner, by indicating whether the notes can plug it directly into the tuner. If you have an acoustic guitar the tuner will have an inbuilt microphone.
There are several types of electronic guitar tuners but most are relatively inexpensive and simple to operate. Tuning using other methods is difficult for beginning guitarists and may take many months to master, so we recommend you purchase an electronic tuner, particularly if you do not have a guitar teacher or a friend who can tune your instrument for you.
Also if your guitar is way out of tune you can always take it to your local music store so they can tune it for you. Once a guitar has been tuned correctly it should only need minor adjustments before each practice session. To learn to tune the guitar using other methods see Appendix One.