For a panoramic I would say take some meter readings across the whole of the scene you intend photograph to ascertain the correct exposure and then set the settings in manual mode. You don't want the exposure to change between each exposure.
Make sure the White Balance is set to an appropriate setting rather than Auto WB. Again, you don't want anything to change between each exposure, in this case the WB.
Use a tripod, set the focus and then switch to Manual Focus, in effect locking the focus. Take as many pictures as you need to cover the scene, but overlap each exposure by a third to a half. Most panoramic software is pretty good at matching images, but may need touching up later.
Wide angle shots may be harder to align because of distortions at the edge of the frame.
That's only from the couple of times I've tried doing panoramic images. Hopefully others with more experience will offer some more advice.