Making a minecraft seed is pretty easy.
First login to minecraft…
Then choose “Single Player”
Next click “Create New World”
Give the world a name, then click “More World Options”
Where it says “Seed For The World Generator” enter anything you want. What you enter will be your seed name… Be sure to have fun with it. 🙂
Then click “create new world…”
And it’ll build up…
Remember if it’s really cool, don’t forget to submit it to your favorite minecraft seeds site!