Lay the t-shirt face down on a flat surface, such as a bed.
Fold the sleeves toward the center of the shirt by making a vertical fold at each shoulder. The t-shirt should now look like a long rectangle.
Fold the rectangle in half horizontally.
Roll the t-shirt tightly from the horizontal fold upward. By rolling the t-shirt, creases are minimized.
Stash the t-shirt in your suitcase in or around other clothes to stabilize the rest of the contents.