Efficient packing in 2026 centers on the "Rule of Three" and modular organization. Pack exactly three of each essential item: one to wear, one to wash, and one to dry. Use compression packing cubes to categorize items by outfit or type, which can save up to 30% of luggage space. Choose a cohesive color palette (neutrals work best) so every top matches every bottom, maximizing your "outfit-per-item" ratio. For toiletries, switch to solids (shampoo bars, stick sunscreen) to bypass the TSA "3-1-1" liquids bag entirely. A high-value 2026 strategy is to utilize "dual-purpose" tech, like a high-end smartphone for photography instead of a bulky DSLR. By focusing on "capsule wardrobe" principles and lightweight, moisture-wicking fabrics, you can easily do a 10-day trip in a single carry-on, avoiding the rising 2026 fees for checked luggage and the risk of lost bags at busy hubs.