How can I efficiently fold shirts in a suitcase for optimal space-saving during travel?

To efficiently fold shirts in a suitcase for optimal space-saving during travel, try the following method: lay the shirt flat, fold the sleeves inwards, then fold the shirt in half lengthwise. Roll the shirt tightly from the bottom up, and place it in the suitcase vertically. This method helps prevent wrinkles and maximizes space in your suitcase.