Maximizing suitcase space requires a "Tetris-like" strategy involving rolling, compression, and filling every void. The gold standard is tightly rolling clothes instead of folding to eliminate air pockets and reduce wrinkles. Use packing cubes to categorize items and compress them further. For bulky items like winter coats or sweaters, vacuum-seal or manual compression bags are essential for flattening fabric. Start by placing heavy items like shoes or toiletries at the bottom (near the wheels) to maintain balance. Utilize the interior of shoes by stuffing them with socks, chargers, or jewelry. Finally, fill small crevices between cubes with "gap-fillers" like underwear or belts. By sticking to a cohesive color palette and versatile basics, you can minimize the total number of items while maximizing outfit combinations.