To pack a suitcase that weighs less, you must start with the "Container Weight": many older hardside cases weigh 10-15 lbs before you even put a sock in them; switching to a modern, ultra-lightweight polycarbonate or duffel bag can save you 5 lbs immediately. The second rule is to "Decant Everything": heavy glass bottles of shampoo and lotion add significant weight; switch to solid toiletries (shampoo bars) or small travel-sized containers. Thirdly, wear your heaviest items (boots, heavy denim, and coats) on the plane rather than packing them. Use the "Roll, Don't Fold" method—while it doesn't change the mass, it allows you to use a smaller, lighter bag. Finally, be ruthless with tech: instead of a laptop, tablet, and heavy DSLR, try to use your smartphone for everything. By using lightweight fabrics like linen or merino wool and limiting yourself to two pairs of shoes, you can easily shave 10-15 lbs off your total baggage weight.