This is a little list in no particular order of what I have learned while cycle touring and camping, this list will probably be edited and added to as I learn and tour more.
Take lots of plastic bags : Like the ones your get from the supermarket. They just come in useful, they just do. To wrap up your wet closing, food and as a bin bag etc. you name it.
Take zip lock plastic bags : Sometime even the best panniers with let some water in. And you want to …

Description: (From their site) Exped DonwnMats: super comfortable, infinitely warmer and more compact than any other comparable mat of similar weight. Since down compresses so well, Downmats also packs very small. The integrated pump makes inflation easy.
As seen on the blog: Label : Exped DonwnMats
UPDATE : We have now use this on very hard rocky ground in Croatia. and even as a “float” when the campsite we stayed at and turned into a river. And what I can I say, these mats simply works we slept through and on anything …

A friend of mine recommended me Exped DownMat 7Pump DLX, it’s the bee’s knees mate. Nearly 3 inches thick filled with down, can do down to -24c. And lighter, and smaller packed, than most other mats that are half as thick. Yes it is a bit expensive I think the price on the street is around £120, but it is worth it, especially when I can get it at cost :)
And we decided to give them a go, because the last time either of us when camping we were sleeping …