i would first try it several times before you really do it with actual money.
![Grin](https://bitcointalk.org/Smileys/default/grin.gif)
in simplewallet, type "seed" to see the words needed to restore your wallet. write them down.
in simplewallet, type "address" to see your adress.
make sure the seed you write down really belongs to the adress you send money to. maybe you try it with 1 xmr (i send it to you if you give me your adress)
to restore all your data from seed, start simplewallet with parameter --restore-deterministic-wallet.
i hope it helps, you can always pm me if you need more help.
also check this guide from fluffypony: https://bitcointalksearch.org/topic/m.8246348. he explains ho to do cold wallet that has never been conected to the internet.
i would really recomend you to try working with the 24 word seed, it is one of my favourite functions in Monero but takes some time to get used to.
Thanks medusa13.
I am using linux. When compiling simplewallet from source, I was protested about missing libunbound package.
When I tried sudo apt-get install libunbound
I got message package libunbound not found
What should I do?