You need the trust document itself and the Deed placing the property into the trust. There are lots trust forms on the internet, but you REALLY should use an attorney for your first one to be sure everything is right, and if you start manipulating the trust in different ways to structure your deals you should consult with an attorney each time you change it around. An investor friendly real estate attorney will be able to help you. If you screw something up with a land trust at the beginning it will really come back to bite you later.
As for the Deed, you would name the trust as the Grantee, but remember that a trust is just a piece of paper and therefore incapable of holding to real estate. You must appoint and entity to act as Trustee of the land trust. The trustee will act on behalf of the trust. It's also helpful to go ahead and enumerate the Trustee's powers in the deed so that you don't have people (title agents) asking you to show them the trust in order to find out if the trustee has authority to act on behalf of the trust.
Other needed documents depend on the structure of your deal.