How can I effectively sleep on planes during long flights?

To effectively sleep on planes during long flights, try to create a comfortable environment by bringing a neck pillow, eye mask, and earplugs. Choose a window seat for better support and less disturbance. Wear comfortable clothing and consider using a blanket. Avoid caffeine and heavy meals before the flight, and try relaxation techniques like deep breathing or listening to calming music. Experiment with different sleeping positions and adjust your seat for maximum comfort.