* Bass: Bass guitar provides low-end support for the guitar and can help to fill out the sound.
* Piano: Piano can be used to add harmony, melody, and texture to a guitar song.
* Strings: Strings can be used to add a lush, textured sound to a guitar song.
* Synthesizers: Synthesizers can be used to create a variety of sounds, from electronic beats to orchestral instruments.
* Vocals: Vocals can add a personal touch to a guitar song and can help to tell a story.
* Ukulele: Ukulele is a smaller, more portable version of the guitar that can add a fun and relaxed feel to a song.