don't take tp - use snowball
don't take stove. eat cold food.
find rocks to bivi under. dont take tent or bivi sack. kiwis are masters of this cause all the bivi caves are marked on their topo maps.
don't take any clothes but what you are wearing. this forces you to keep moving to keep warm.
pick a route you can solo. there goes weight of harnesses, ropes, gear.
wtf - don't even take food. Americans are the fattest people on earth. you can live for a day or two off your chub.