cut all the straps and buckles you don't need off your pack...sounds ridiculous, but if you add it all up you'll be surprised how much weight you'll be saving.
Also, buy a brunton crux or snowpeak gigapower stove instead of a white gas model for summer use. Old stove (himalaya varifuel = 440 grams, plus super heavy fuel canister and pump). Snowpeak = 74 grams, plus super light fuel canister.
Also, take a six pack of cans instead of a six pack of bottles