I'm going to assume you mean "stop iPad from automatically syncing - with iTunes" (?). If so, connect your iPad to iTunes. Then, go to Edit > Preferences > Devices. Underneath the window the shows all the device backups, there should be Aline labeled ' Prevent [iDevices] from syncing automatically. Make sure the box next to this line is checked.
Then, click on your iPad (in the left column) and go to the Apps tab on the right side of iTunes. Underneath the list of apps is another box. This one is titled "Automatically sync new apps." Ensure that box is UNchecked.
Now, if you are not on the most current iOS, your iTunes may open with a pop-up that tells you that you are not on the most current firmware (and what do you want to do about it). Select cancel, but, before you do, check the box (in the pop-up) that says "Don't ask me again." And, it never will. I've not seen that popup since iOS 3.x on my first iPad1. So, it still works..
Those are the three ways I know of for you to gain some measure of control from iTunes. I have all this done and so iTunes does nothing with my iDevice until I ask it to. Oh, and I only use iTunes to keep all the apps I've bought and to keep a current backup. It just makes me happier that way.
Hope this helps. If this is not what you meant by stopping your iPad from syncing, could you give more info (and sorry if I went off tangent).
Marilyn