Draw a long vertical oval or teardrop shape for the outline
Taper both ends to make the surfboard pointed
Add a slight curve along both sides for a natural shape
Draw a center line from top to bottom
Sketch the fins near the bottom end
Add a leash plug near the tail if desired
Refine the outline and smooth the edges
Erase any extra guide lines
Add simple details like stripes, logos, or patterns
Outline the final drawing with clean lines