Draw a long oval shape for the guitar body
Add a narrow rectangle or neck extending from the body
Draw a small circle or oval for the sound hole in the center of the body
Sketch the bridge near the bottom of the body
Add six strings from the bridge to the top of the neck
Draw the headstock at the end of the neck
Add tuning pegs on both sides of the headstock
Outline the body shape to make it more guitar-like
Add the fret lines across the neck
Erase extra guide lines
Darken the final lines
Add details like pickguard, frets, and curves if desired