I had never heard of moleskin before I read the Disboards and it was a lifesaver on our last trip. But I bought it in a roll and forgot a scissor, oops! We had to cut it with a nailclipper and it was a challenge to say the least.
One thing I wish I would have brought is extra camera memory cards.

Day 3 I had already filled one card and need to download onto a CD at the camera shop.
I will probably skip shampoo/conditioner for the kids & DH next trip since there is plenty in the room and they aren't picky about what they use.
I found almost all of the meds I needed to bring are available in a thin strip form which made them easier to pack for the parks and quick to use. We don't take any prescription meds so it was a cinch to pack our medications.
I will not pack so many toys for the kids. I thought they would need distrations on the airplane and in the room but most were never touched and it wasted packing space.
Tons of ziploc bags! I read it somewhere here and we used them all the time!