This doesn't have anything to do with your post in the Angry thread, does it?
Basically, you can write your own will with guidance from web sources you can Google as easily as I can, or you can buy a Will form in places that sell those written-by-lawyers forms for various things, but you're probably best off to pay a real lawyer to do it for you (just have all the info ahead of time), and make sure a few relatives know of the location and existence of your will.
Assuming you're not going to leave behind a billion-dollar estate, it should all go pretty smoothly.