I'll throw in there a Scroll of Breath of Life. It'll bring you back from the dead (though it's only within one round of the death). I've seen it save at least one person's bacon.
For healing types, there's also metamagic rods of reach, to help you get healing on people you can't reach. The lesser version will cover levels 1-3 and it's only 3000 gp.
A wand of Endure Elements and also be bought with prestige and just makes travelling in nasty conditions so much easier.
