Other ways to tune a guitar

Next we have harmonics. Advanced guitarists prefer using harmonics when it comes to tuning their instrument. Harmonics can be hard to learn, but the result is a very accurate tuning.
Instead of holding a string down, below the fret, you touch the string very lightly at the fret This is harmonics. This is not the best tuning methods for beginners but it is mentioned here to give you a complete overview of guitar tuning.
There are many other ways to tune a guitar. Slack key tuning is tuning some strings lower than other types of tuning. The result is a major chord when all strings are played. A tuning method used in rock and classical guitar is D tuning. This involves tuning the D string instead of the E string. No matter what type of tuning you use, it is best to tune your guitar frequently. Strings get out of tune over time especially if you play your guitar a lot and practice a lot.