First of all, I would think seriously about whether it would be better to actually ship items which would be expensive to replace. You may find it is more economical and sensible to ship some items rather than replacing them with new items here.
As for getting rid of stuff - if you want to recoup some of your costs, then the obvious things are to have a car boot sale, garage sale, sell on ebay, advertise via local paper, supermarket/newsagent sales boards (the cards you put up in small shops sometimes to advertise things for sale).
Otherwise you can have your friends round and they can take what they want or you can give your stuff to charity shops. I always think it is nice to do a bit of targeted donation - give things to people who can actually use them - eg clothes and household goods to women's refuges etc, old towels to animal shelters, stationery, toys, games etc to schools, books to schools or libraries or friends.
Whatever you do, start early and have a good declutter!