Second on the eye lag idea - I had to do this once - and also a second on the "bring a good pad" - the two nights I slept on a tent pad were pretty chilly, and you get pretty much next to no insulative effect (at least on the one I was on which was up in the air) from the ground.

It's kind of like sleeping in a hammock, only much more uncomfortable - today there's no way you'd get me on one if there were trees anywhere in the area to hang from!