reduce how many socks you carry. say, 2 pair total.. pick your sock thickness based on time of year, but carry only 2 pair. one for wearing, one thats washed and drying.
wear shorts with zip off pant legs instead of 1 pair of shorts and 1 pair of pants. Or just wear shorts and wear some gaiters.
Reuse a pepsi bottle rather than carry the Nalgene (I usually carry a Nalgene personally, and dont mind the few extra oz in exchange for proven durability)
Switch to an alcohol stove. lighter stove wieght, and fuel weighs less per meal cooked (in my usual conditions anyway, you may get a better return with the esbit fuel. run some tests for yourself)
Use a fingertip toothbrush, use tooth powder (not paste) and dont worry about soap. worried about smelling like a yeti? Use some purelle on your pits.
Dump the pack cover, and use a pack *liner* (one of those trash bags your carrying will do the job nicely), and replace your emergency poncho with a real one... wear the poncho over your backpack when it rains.
Consider a Down sleeping bag. I prefer synthetics, but for cutting the most weight with the least (usually no) loss of comfort on the trail, down wins. It looses its insulation if it gets wet, but keep it as dry as you can and save a pound (or two)
You *could* go with GossamerGears evazote pad, and save about 1/2 pound over the Thermarest.
Go with a smaller single bulb LED light system and save 2.5oz and go with spectra cord rather than "rope". Thatll save you some weight (and probably ADD strength) as well.
Just a few thoughts... Im sure others have plenty to add.