Use a steam iron on the appropriate fabric setting
Lightly mist the shirt with water before ironing
Hang the shirt in a steamy bathroom for a few minutes
Use a handheld garment steamer
Toss the shirt in the dryer with a damp towel for a few minutes
Smooth the shirt by hand while it is slightly damp
Hang the shirt immediately after drying
Use wrinkle-release spray and tug the fabric flat
Place a clean cloth between the iron and delicate fabric
Check the care label before applying heat